Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
  • C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
  • C07D215/12—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
  • C07D215/14—Radicals substituted by oxygen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
  • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
  • C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/06—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
  • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
  • C07D409/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C40—COMBINATORIAL TECHNOLOGY
  • C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
  • C40B40/00—Libraries per se, e.g. arrays, mixtures

Definitions

• the present invention relates generally to the synthesis of heterocyclic compounds based on the 4-substituted quinoline ring. More specifically, the invention provides novel 4-substituted quinolines as well as novel libraries comprised of such compounds.
• the process of discovering new therapeutically active compounds for a given indication involves the screening of all compounds from available compound collections. From the compounds tested one or more structure(s) is selected as a promising lead. A large number of related analogs are then synthesized in order to develop a structure-activity relationship and select one or more optimal compounds. With traditional one-at-a-time synthesis and biological testing of analogs, this optimization process is long and labor intensive. Adding significant numbers of new structures to the compound collections used in the initial screening step ofthe discovery and optimization process cannot be accomplished with traditional one-at-a-time synthesis methods, except over a time frame of months or even years. Faster methods are needed that allow for the preparation of up to thousands of related compounds in a matter of days or a few weeks. This need is particularly evident when it comes to synthesizing more complex compounds, such as 4-substituted quinolines.
• SCLs chemically synthesized combinatorial libraries
• the preparation and use of synthetic peptide combinatorial libraries has been described, for example, by Dooley in U.S. Patent 5,367,053, Huebner in U.S. Patent 5,182,366, Appel et al. in WO PCT 92/09300, Geysen in published European Patent Application 0 138 855 and Pirrung in U.S. Patent 5,143,854.
• SCLs provide the efficient synthesis of an extraordinary number of various peptides in such libraries and the rapid screening ofthe library which identifies lead pharmaceutical peptides.
• organic libraries to the present, are of limited diversity and generally relate to peptidomimetic compounds; in other words, organic molecules that retain peptide chain pharmacophore groups similar to those present in the corresponding peptide.
• the present invention satisfies these needs and provides related advantages as well.
• the present invention overcomes the known limitations to classical organic synthesis of -4-substituted quinolines and as well as the shortcomings of combinatorial chemistry with heterocycles.
• the present invention combines the techniques of solid-phase synthesis of heterocycles and the general techniques of synthesis of combinatorial libraries to prepare new 4-substituted quinoline compounds.
• the present invention relates to novel 4-substituted quinoline compounds ofthe following formula, libraries containing at least two or more such compounds, and to the generation of such combinatorial libraries composed of such compounds:
• R , R , R , R , R , R , R , and Y have the meanings provided below.
• Figure 1 provides Reaction Scheme I for preparing the 4-substituted quinoline compounds ofthe present invention.
• Figure 2 shows a more detailed reaction scheme, Reaction Scheme II, for the preparation ofthe subject 4-substituted quinolines and libraries containing the same.
• Figure 3 provides Reaction Scheme III for the preparation of libraries and compounds containing alternatively substituted 4-substituted quinolines at the R 11 position.
• Figure 4 provides Reaction Scheme IV for the preparation of libraries and compounds containing altematively substituted 4-substituted quinolines at the R 9 position.
• Figure 5 provides Reaction Scheme V for the preparation of oxidized libraries and compounds ofthe present invention.
• the present invention provides novel derivatives and libraries of novel derivatives of variously substituted 4-substituted quinoline compounds of Formula I:
• R 1 is absent or present and, when present, is C, to C 10 alkylene, C, to C 10 substituted alkylene, C 2 to C 10 alkenyl, C 2 to C 10 substituted alkenyl, C 2 to C, 0 alkenylene, C 2 to Cn, substituted alkenylene, C 2 to C 10 alkynyl, C 2 to C 10 substituted alkynyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, C 5 to C 7 cycloalkenyl, C 5 to C 7 substituted cycloalkenyl, phenylene, substituted phenylene, naphthyl, substituted naphthyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, heterocyclic ring, substituted heterocyclic ring, heteroaryl ring, substituted heteroaryl ring, amino, (monosubstituted)amino,
• p and q are independently selected from a number 0 to 6, wherein both p and q are not both 0; and Ar is an aryl group selected from the group consisting of phenyl, substituted phenyl, heteroaryl ring or substituted heteroaryl ring;
• R 2 , R 3 , and R 4 are, independently, a hydrogen atom, halo, hydroxy, protected hydroxy, cyano, nitro, C, to C 10 alkyl, C 2 to C 10 alkenyl, C 2 to C 10 alkynyl, C, to C 10 substituted alkyl, C 2 to C 10 substituted alkenyl, C 2 to C 10 substituted alkynyl, C, to C 7 alkoxy, C, to C 7 substituted alkoxy, C, to C 7 acyloxy, C, to C 7 acyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, C 5 to C 7 cycloalkenyl, C 5 to C 7 substituted cycloalkenyl, heterocyclic ring, substituted heterocyclic ring, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, phenyl, substituted phenyl, naph
• R 5 is hydrogen, C [ to C 10 alkyl, C, to C 10 substituted alkyl, C 2 to C 10 alkenyl, C 2 to C 10 substituted alkenyl, C 2 to C 10 alkynyl, C 2 to C 10 substituted alkynyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, C 5 to C 7 cycloalkenyl, C 5 to C 7 substituted cycloalkenyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, carboxy, protected carboxy, C, to C 7 acyl, C, to C 7 substituted acyl, heterocyclic ring, substituted heterocyclic ring, heteroaryl ring or substituted heteroaryl ring; R 6 is a phenyl, substituted phenyl, napthy
• n is from 1 to 4, or a group ofthe formula:
• R 10 and R n are, independently, selected from hydrogen, C, to C 10 alkyl, C, to C 10 substituted alkyl, C 2 to C 10 alkenyl, C 2 to C 10 substituted alkenyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, C 5 to C 7 cycloalkenyl, C 5 to C 7 substituted cycloalkenyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, C, to C 7 acyl, R1 to C 7 substituted acyl, C, to C 4 alkyl sulf oxide, phenylsulfoxide, substituted phenylsulfoxide, C, to C 4 alkylsulfonyl, phenylsulfonyl, or substituted phenylsulf
• R 7 is a hydrogen atom, C, to C 10 alkyl, C, to C 10 substituted alkyl, C 7 to C 12 phenylalkyl, C 7 to C I2 substituted phenylalkyl, phenyl, or substituted phenyl;
• R 9 is a hydrogen atom, C, to C 10 alkyl, C, to C 10 substituted alkyl, C 7 to C !2 phenylalkyl, C 7 to C 12 substituted phenylalkyl, C, to C 7 acyl, C, to C 7 substituted acyl, phenylsulfonyl, substituted phenylsulfonyl, C, to C 4 alkylsulfonyl, C, to C 4 substituted alkylsulfonyl, C, to C 6 alkylaminocarbonyl, C, to C 6 substituted alkylaminocarbonyl, phenylaminocarbonyl, or substituted phenylaminocarbonyl; and
• Y is CO 2 H, OH, SH, NHR 12 , C(O)NHR 12 , CH 2 OH, CH 2 NH 2 , or CH 2 NHR 12 , wherein R 12 is a hydrogen atom, C, to C, 0 alkyl, C, to C 10 substituted alkyl, or a functionalized resin, and more preferably, Y is CO 2 H, NHR 12 or C(O)NHR 12 wherein R 12 is a hydrogen atom, C, to C 10 alkyl, C, to C 10 substituted alkyl, or a functionalized resin.
• p and q are independently selected from a number 0 to 6, wherein p and q are not both 0.
• p and q are independently selected from 0 to 4 and, more preferably, from 0 to 3.
• R 1 is absent or present and, when present, is C, to C 10 alkylene, C, to C 10 substituted alkylene, C 2 to C 10 alkenyl, C 2 to C 10 substituted alkenyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, phenylene, substituted phenylene, naphthyl, substituted naphthyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, heterocyclic ring, substituted heterocyclic ring, heteroaryl ring, substituted heteroaryl ring, amino, (monosubstituted)amino, or a group ofthe formula: -CH 2 CONH-;
• R 2 , R ⁇ and R 4 are, independently, a hydrogen atom, halo, hydroxy, protected hydroxy, C, to C 10 alkyl, C t to C 10 substituted alkyl, C[ to C 7 alkoxy, C, to C 7 substituted alkoxy, cyclic C 2 to C 7 alkylene, substituted cyclic C 2 to C 7 alkylene, or nitro;
• R 5 is hydrogen, C, to C 10 alkyl, C, to C 10 substituted alkyl, C 2 to C 10 alkenyl, C 2 to C 10 substituted alkenyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, C 5 to C 7 cycloalkenyl, C 5 to C 7 substituted cycloalkenyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, carboxy, protected carboxy, C ( to C 7 acyl, C, to C 7 substituted acyl, heterocyclic ring, substituted heterocyclic ring, heteroaryl ring or substituted heteroaryl ring;
• R° is a phenyl, substituted phenyl, napthyl, substituted naphphyl, or a group ofthe formula:
• n is from 1 to 2, or a group ofthe formula:
• R 10 and R ⁇ are, independently, selected from hydrogen, C, to C 10 alkyl, Cj to C 10 substituted alkyl, phenyl, substituted phenyl, C 7 to C 12 phenylalkyl, or C 7 to
• R 7 is a hydrogen atom, C, to C 10 alkyl, or C, to C 10 substituted alkyl;
• R 9 is a hydrogen atom, C, to C 10 alkyl, C, to C 10 substituted alkyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, C, to C 7 acyl, C, to C 7 substituted acyl, phenylsulfonyl, substituted phenylsulfonyl, C, to C 4 alkylsulfonyl, C, to C 4 substituted alkylsulfonyl, C, to C 6 alkylaminocarbonyl, C, to C 6 substituted alkylaminocarbonyl, phenylaminocarbonyl, or substituted phenylaminocarbonyl; and
• Y is CO 2 H, NHR 12 or C(O)NHR 12 , wherein R 12 is a hydrogen atom, C, to C 6 alkyl, C, to C 6 substituted alkyl, or a functionalized resin, and more preferably, Y is C(O)NHR 12 , wherein R 12 is a hydrogen atom, C j to C 6 alkyl, C, to C 6 substituted alkyl, or a functionalized resin.
• R groups and Y are as defined above or below, provided that when R 5 is carboxy or carboalkoxy, R 6 is not N-pyrrolidinyl and/or that when R 5 is hydrogen and R 2 , R 3 , and/or R4 are nitro, R6 is not phenyl.
• R ! is absent or present and, when present, is -CH 2 CONH- or -CH 2 CH(NHR 8 )-, wherein R 8 is hydrogen, C, to C 10 alkyl, C, to C 10 substituted alkyl, C 2 to C 10 alkenyl, C 2 to C 10 substituted alkenyl, C 2 to C 10 alkynyl, C 2 to C 10 substituted alkynyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl, C, to C 7 acyl, C, to C 7 substituted acyl, aminocarbonyl, protected aminocarbonyl, (monosubstituted)aminocarbonyl, protected (monosubstitituted)aminocarbonyl, (disubstituted) aminocarbonyl, C, to C 4 alkylsulfonyl
• R 2 , R 3 , and R 4 are each, independently, a hydrogen atom, hydroxy, halo, C, to C 6 alkyl, C, to C 7 alkoxy, cyclic C 2 to C 7 alkylene, or nitro;
• R 5 is a hydrogen atom, carboxy, C, to C, 0 alkyl, C, to C 10 substituted alkyl, C, to C 10 alkenyl, C, to C I0 substituted alkenyl, C 3 to C 7 cycloalkyl, C 3 to C 7 substituted cycloalkyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, heterocyclic ring, substituted heterocyclic ring, heteroaryl ring or substituted heteroaryl ring;
• R 6 is a phenyl, substituted phenyl, or a group ofthe formula:
• n is from 1 to 2, or a group ofthe formula:
• R 10 and R n are, independently, selected from a hydrogen atom, C, to C 10 alkyl, C, to C 10 substituted alkyl, phenyl, or substituted phenyl;
• R 7 is a hydrogen atom or C, to C 10 alkyl
• R 9 is a hydrogen atom
• Y is C(O)NH 2 or C(O)NH bound to a functionalized resin.
• R 8 is acetyl, ⁇ -cyclohexylphenylacetyl, ⁇ -methylcinnamoyl, ⁇ , ⁇ , ⁇ -trifluoro-m- toluoyl, ⁇ , ⁇ , ⁇ -trifluoro-o-toluoyl, ⁇ , ⁇ , ⁇ -trifluoro-p-toluoyl, benzoyl, butyroyl, crotonoyl, cyclobutanecarboxyl, cycloheptanecarboxyl, cyclohexanebutyroyl, cyclohexanecarboxyl, cyclohexanepropionoyl, cyclohexylacetyl, cyclopentanecarboxyl, cyclopentylacetyl, ethoxyacetyl, 4-chlorocinnamoyl,
• R 5 is l-methyl-2-pyrrolyl, 1 -napthyl, 2,2-dimethyl-3-butenyl, 2,3,4-trifluorophenyl, 2,3,5-trichlorophenyl, 2,3-difluorophenyl, 1 ,2-dimethylbutyl, 2,4-dichlorophenyl, 2,5-difluorophenyl, 2,5-dimethylphenyl, 2,6-difluorophenyl, 2-bromophenyl, 2- chloro-5-nitrophenyl, 2-chloro-6-fluorophenyl, 2-cyanophenyl, 3-pentyl, 2- fluorophenyl, 2-(3-(3-oxapropanoic acid))phenyl, 2-methoxy-l -naphthyl, 2-butyl, 1-methyldecyl, 2-pentyl, 2-nitro-5-chlorophenyl, 2-nitrophenyl, 2-pyri
• R 6 is 4-methoxyphenyl, 4-ethoxyphenyl, 3,4-dimethoxyphenyl, 2,4,5- trimethoxyphenyl, N-pyrrolidonyl, or N-methyl-N-acetyl-amino;
• R 7 is a hydrogen atom or methyl
• R 9 is a hydrogen atom
• Y is C(O)NH 2 or C(O)NH bound to a functionalized resin.
• R 1 is CH 2 CH(NHR 8 ) wherein R 8 is acetyl, -cyclohexylphenylacetyl, - methylcinnamoyl, ⁇ , ⁇ , ⁇ -trifluoro-m-toluoyl, ⁇ , , ⁇ -trifluoro-o-toluoyl, ⁇ , ⁇ , ⁇ - trifluoro-p-toluoyl, benzoyl, butyroyl, crotonoyl, cyclobutanecarboxyl, cycloheptanecarboxyl, cyclohexanebutyroyl, cyclohexanecarboxyl, cyclohexanepropionoyl, cyclohexylacetyl, cyclopentanecarboxyl, cyclopentylacetyl, ethoxyacetyl, 4-chlorocinnamoyl, 4-cyanobenzoyl, hydrocinnam
• R 2 , R 3 , and R 4 are each, independently, a hydrogen atom
• R 5 is l-methyl-2-pyrrolyl, 1 -napthyl, 2,2-dimethyl-3-butenyl, 2,3,4-trifluorophenyl, 2,3,5-trichlorophenyl, 2,3-difluorophenyl, 1,2-dimethylbutyl, 2,4-dichlorophenyl, 2,5-difluorophenyl, 2,5-dimethylphenyl, 2,6-difluorophenyl, 2-bromophenyl, 2- chloro-5-nitrophenyl, 2-chloro-6-fluorophenyl, 2-cyanophenyl, 3 -pentyl, 2- fluorophenyl, 2-(3-(3-oxapropanoic acid))phenyl, 2-methoxy-l -naphthyl, 2-butyl,
• R 6 is 4-methoxyphenyl, 4-ethoxyphenyl, 3,4-dimethoxyphenyl, 2,4,5- trimethoxyphenyl, N-pyrrolidonyl, or N-methyl-N-acetyl-amino;
• R 7 is a hydrogen atom or methyl
• R 9 is a hydrogen atom
• Y is C(O)NH 2 or C(O)NH bound to a functionalized resin.
• R 1 is absent or CH 2 NHCO
• R 5 is l-methyl-2 -pyrrolyl, 1 -napthyl, 2,2-dimethyl-3-butenyl, 2,3, 4-trifluorophenyl, 2,3,5-trichlorophenyl, 2,3-difluorophenyl, 1 ,2-dimethylbutyl, 2,4-dichlorophenyl, 2,5-difluorophenyl, 2,5-dimethylphenyl, 2,6-difluorophenyl, 2-bromophenyl, 2- chloro-5-nitrophenyl, 2-chloro-6-fluorophenyl, 2-cyanophenyl, 3-pentyl, 2- fluorophenyl, 2-(3-oxa-3-propionoyl)-phenyl, 2-methoxy-l -naphthyl, 2-butyl, 1- methyldecyl, 2-pentyl, 2-nitro-5-chlorophenyl, 2-nitrophenyl, 2-pyri
• R 6 is 4-methoxyphenyl, 4-ethoxyphenyl, 3,4-dimethoxyphenyl, 2,4,5- trimethoxyphenyl, N-pyrolidonyl, or N-methyl-N-acetyl-amino;
• R 7 is a hydrogen atom or methyl
• R 9 is a hydrogen atom
• Y is C(O)NH 2 or C(O)NH bound to a functionalized resin.
• R 1 is absent or present and, when present, is selected from -CH 2 NHCO- or CH 2 CH(NHR 8 ) wherein R 8 is acetyl, ⁇ -cyclohexylphenylacetyl, ⁇ - methylcinnamoyl, ⁇ , ⁇ , ⁇ -trifluoro-m-toluoyl, ⁇ , ⁇ , ⁇ -trifluoro-o-toluoyl, ⁇ , ⁇ , ⁇ - trifluoro-p-toluoyl, benzoyl, butyroyl, crotonoyl, cyclobutanecarboxyl, cycloheptanecarboxyl, cyclohexanebutyroyl, cyclohexanecarboxyl, cyclohexanepropionoyl, cyclohexylacetyl, cyclopentanecarboxyl, cyclopentylacetyl, ethoxyacetyl, 4-
• R 5 is a hydrogen atom, phenyl, chloroacetyl, cyclohexanyl, D,L-1,2- (dihydroxy)ethyl, carboxy, acetyl, 2-hydroxyphenyl, tribromoacetyl, trimethylacetyl, l-methyl-2-pyrrolyl, 1 -napthyl, 2,3,4-trifluorophenyl, 2,3,5- trichlorophenyl, 2,3-difluorophenyl, 2,4-dichlorophenyl, 2,5-difluorophenyl, 2,5- dimethylphenyl, 2,6-difluorophenyl, 2-bromophenyl, 2-chloro-5-nitrophenyl, 2- chloro-6-fluorophenyl, 2-cyanophenyl, 2-ethylbutyryl, 2-fluorophenyl, 2-(2- oxymethylenecarboxy)phenyl, 2-methoxy- 1
• nalidixoyl 2-phenyl-4-quinolinecarboxy, 2-pyrazinecarboxy, niflumoyl, 4-nitrophenylacetyl, 4-(4-nitrophenyl)butyroyl, (3,4-dimethoxyphenyl)-acetyl,
• n 1 ;
• Y is C(O)NH 2 or C(O)NH bound to a functionalized resin.
• the R'-Y substituents are such that Y is always bonded to the 1 -position ofthe R 1 radical. All naming above and hereinafter reflects this positioning between the two substituents.
• the stereochemistry of chiral centers associated with the R 1 through R 12 groups can independently be in the R or S configuration, or a mixture ofthe two. These can be designated as R or S or R,S or d,D, 1,L or d,l, D,L.
• C, to C 10 alkyl denotes such radicals as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, amyl, tert-amyl, hexyl and the like.
• the preferred "C, to C 10 alkyl” group is methyl.
• C 2 to C 10 alkenyl denotes such radicals as vinyl, allyl, 2- butenyl, 3-butenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 2-hexenyl, 3-hexenyl, 4- hexenyl, 5-hexenyl, 2-heptenyl, 3-heptenyl, 4-heptenyl, 5-heptenyl, 6-heptenyl, as well as dienes and trienes of straight and branched chains.
• C 2 to C 10 alkynyl denotes such radicals as ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl, as well as di- and tri-ynes of straight and branched chains.
• C, to C 10 alkylene means a C, to C 10 alkyl group where the alkyl radical is bonded at two positions connecting together two separate additional groups.
• Examples of C, to C 10 alkylene include methylene, 1,2-ethyl, 1,1 -ethyl, 1,3- propyl.
• C 2 to C 10 alkenylene means a C 2 to C 10 alkenyl radical which is bonded at two positions connecting together two separate additional groups.
• C, to C 10 substituted alkyl denotes that the above C, to C 10 alkyl groups and C 2 to C 10 alkenyl and alkynyl groups are substituted by one or more, and preferably one or two, halogen, hydroxy, protected hydroxy, oxo, protected oxo, cyclohexyl, naphthyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, guanidino, heterocyclic ring, substituted heterocyclic ring, imidazolyl, indolyl, pyrrolidinyl, C, to C 7 alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, nitro, C, to C 7 alkyl ester, carboxy, protected
• substituted alkyl, alkenyl or alkynyl groups may be substituted once or more, and preferably once or twice, with the same or with different substituents.
• C, to C 10 alkyl, C 2 to C, 0 alkenyl, C 2 to C 10 alkynyl, C, to C ]0 substituted alkyl, C 2 to C !0 substituted alkenyl, or C 2 to C 10 substituted alkynyl and the like are preferably C, to C 7 or C 2 to C 8 , respectively, and more preferably, C, to C 6 and C 2 to C 7 .
• Examples ofthe above substituted alkyl groups include the 2-oxo- prop-1-yl, 3-oxo-but-l-yl, cyanomethyl, nitromethyl, chloromethyl, hydroxymethyl, tetrahydropyranyloxymethyl, trityloxymethyl, propionyloxymethyl, amino, methylamino, aminomethyl, dimethylamino, carboxymethyl, allyloxycarbonylmethyl, allyloxycarbonylaminomethyl, methoxymethyl, ethoxymethyl, t-butoxymethyl, acetoxymethyl, chloromethyl, bromomethyl, iodomethyl, trifluoromethyl, 6- hydroxyhexyl, 2,4-dichloro(n-butyl), 2-aminopropyl, chloroethyl, bromoethyl, fluoroethyl, iodoethyl, chloropropyl, bromopropyl, fluoropropyl, iodo
• Examples ofthe above substituted alkenyl groups include styrenyl, 3- chloro-propen- 1 -yl, 3 -chloro-buten- 1 -yl, 3 -methoxy-propen-2-yl, 3 -phenyl-buten-2-yl, l-cyano-buten-3-yl and the like.
• the geometrical isomerism is not critical, and all geometrical isomers for a given substituted alkenyl can be used.
• Examples ofthe above substituted alkynyl groups include phenylacetylen-1-yl, l-phenyl-2-propyn-l-yl and the like.
• C, to C 10 substituted alkylene means a C, to C, 0 alkyl group where the alkyl radical is bonded at two positions connecting together two separate additional groups and further bearing an additional substituent.
• Examples of C, to C 10 substituted alkylene includes aminomethylene, 1 -(amino)- 1,2-ethyl, 2-(amino)-l,2- ethyl, l-(acetamido)- 1,2-ethyl, 2-(acetamido)- 1,2-ethyl, 2 -hydroxy- 1,1 -ethyl, 1- (amino)- 1,3 -propyl.
• C 2 to C 10 substituted alkenylene means a C 2 to C substituted alkenyl group where the alkenyl radical is bonded at two positions connecting together two separate additional groups and further bearing an additional substituent.
• oxo denotes a carbon atom bonded to two additional carbon atoms substituted with an oxygen atom doubly bonded to the carbon atom, thereby forming a ketone moiety.
• protected oxo denotes a carbon atom bonded to two additional carbon atoms substituted with two alkoxy groups or twice bonded to a substituted diol moiety, thereby forming an acyclic or cyclic ketal moiety.
• C, to C 7 alkoxy denotes groups such as methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, t-butoxy and like groups.
• a preferred alkoxy is methoxy.
• C, to C 7 substituted alkoxy means the alkyl portion ofthe alkoxy can be substituted in the same manner as in relation to C, to C 6 substituted alkyl.
• C, to C 7 acyloxy denotes herein groups such as formyloxy, acetoxy, propionyloxy, butyryloxy, pentanoyloxy, hexanoyloxy, heptanoyloxy and the like.
• C, to C 7 acyl encompasses groups such as formyl, acetyl, propionyl, butyryl, pentanoyl, pivaloyl, hexanoyl, heptanoyl, benzoyl and the like.
• Preferred acyl groups are acetyl and benzoyl.
• C, to C 7 substituted acyl denotes the acyl group substituted by one or more, and preferably one or two, halogen, hydroxy, protected hydroxy, oxo, protected oxo, cyclohexyl, naphthyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, guanidino, heterocyclic ring, substituted heterocyclic ring, imidazolyl, indolyl, pyrrolidinyl, C, to C 7 alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, nitro, C, to C 7 alkyl ester, carboxy, protected carboxy, carbamoyl, carboxamide, protected carboxamide, N-(C, to C 6 alkyl)carboxamide, protected N-(C, to C 6 alkyl)carboxamide, N-(C
• C, to C 7 substituted acyl examples include 4-phenylbutyroyl, 3- phenylbutyroyl, 3-phenylpropanoyl, 2-cyclohexanylacetyl, cyclohexanecarbonyl, 2- furanoyl and 3-dimethylaminobenzoyl.
• C 3 to C 7 cycloalkyl includes the cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl rings.
• the substituent term “C 3 to C 7 substituted cycloalkyl” indicates the above cycloalkyl rings substituted by one or two halogen, hydroxy, protected hydroxy, C, to C 6 alkyl, C, to C 7 alkoxy, oxo, protected oxo, (monosubstituted)amino, (disubstituted)amino, trifluoromethyl, carboxy, protected carboxy, phenyl, substituted phenyl, amino, or protected amino groups.
• C 5 to C 7 cycloalkenyl indicates a 1,2, or 3-cyclopentenyl ring, a 1,2,3 or 4-cyclohexenyl ring or a 1,2,3,4 or 5-cycloheptenyl ring
• C 5 to C 7 substituted cycloalkenyl denotes the above C 5 to C 7 cycloalkenyl rings substituted by a C, to C 6 alkyl radical, halogen, hydroxy, protected hydroxy, C, to C 7 alkoxy, trifluoromethyl, carboxy, protected carboxy, oxo, protected oxo, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, phenyl, substituted phenyl, amino, or protected amino.
• heterocyclic ring denotes optionally substituted five- membered or six-membered rings that have 1 to 4 heteroatoms, such as oxygen, sulfur and/or nitrogen, in particular nitrogen, either alone or in conjunction with sulfur or oxygen ring atoms. These five-membered or six-membered rings may be saturated, fully saturated or partially unsaturated, with fully saturated rings being preferred.
• a “substituted heterocyclic ring” means any ofthe above-described heterocycles substituted with any ofthe substituents as referred to above in relation to substituted phenyl.
• An “amino-substituted heterocyclic ring” means any one ofthe above- described heterocyclic rings is substituted with at least one amino group.
• Preferred heterocyclic rings include morpholino, piperidinyl, piperazinyl, tetrahydrofurano, pyrrolo, and tetrahydrothiophen-yl.
• Aryl group which can be used with present invention include phenyl, substituted phenyl, as defined above, heteroaryl, and substituted heteroaryl.
• heteroaryl or “heteroaryl ring” means a heterocyclic aromatic derivative which is a five-membered or six-membered ring system having from 1 to 4 heteroatoms, such as oxygen, sulfur and/or nitrogen, in particular nitrogen, either alone or in conjunction with sulfur or oxygen ring atoms.
• heteroaryls examples include pyridinyl, pyrimidinyl, and pyrazinyl, pyridazinyl, pyrrolo, furano, oxazolo, isoxazolo, thiazolo and the like.
• substituted heteroaryl or “substituted heteroaryl ring” means the above-described heteroaryl is substituted with, for example, one or more, and preferably one or two, substituents which are the same or different which substituents can be halogen, hydroxy, protected hydroxy, cyano, nitro, C, to C 6 alkyl, C, to C 7 alkoxy, C, to C 7 substituted alkoxy, C, to C 7 acyl, C [ to C 7 acyloxy, carboxy, protected carboxy, carboxymethyl, protected carboxymethyl, hydroxymethyl, protected hydroxymethyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino carboxamide, protected carboxamide, N-(C, to C 6 alky ⁇ )carboxamide, protected N-(C, to C 6 alkyl)carboxamide, N, N-di(C, to
• C 7 to C 12 phenylalkyl denotes a C t to C 6 alkyl group substituted at any position by a phenyl ring. Examples of such a group include benzyl, 2-phenylethyl, 3-phenyl(n-propyl), 4-phenylhexyl, 3 -phenyl (n-amyl), 3-phenyl(sec- butyl) and the like.
• Preferred C 7 to C 12 phenylalkyl groups are the benzyl and the phenylethyl groups.
• C 7 to C 12 substituted phenylalkyl denotes a C 7 to C 12 phenylalkyl group substituted on the C, to C 6 alkyl portion with one or more, and preferably one or two, groups chosen from halogen, hydroxy, protected hydroxy, oxo, protected oxo, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, guanidino, heterocyclic ring, substituted heterocyclic ring, C, to C 7 alkoxy, C, to C 7 substituted alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, nitro, carboxy, protected carboxy, carbamoyl, carboxamide, protected carboxamide, N-(C, to C 6 alkyl)carboxamide, protected N-C, to C 6 alkyl)carboxamide, N, N-(C, to to C 6
• C 7 to C 12 substituted phenylalkyl examples include groups such as 2-phenyl-l-chloroethyl, 2-(4-methoxyphenyl)ethyl, 4-(2,6-dihydroxy phenyl)n-hexyl, 2-(5-cyano-3-methoxyphenyl)n-pentyl, 3-(2,6-dimethylphenyl)n- propyl, 4-chloro-3-aminobenzyl, 6-(4-methoxyphenyl)-3-carboxy(n-hexyl), 5-(4- aminomethylphenyl)-3-(aminomethyl)n-pentyl, 5-phenyl-3-oxo-n-pent-l-yl and the like.
• substituted phenyl specifies a phenyl group substituted with one or more, and preferably one or two, moieties chosen from the groups consisting of halogen, hydroxy, protected hydroxy, cyano, nitro, C, to C 6 alkyl, C, to C 7 alkoxy, C, to C 7 substituted alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, carboxy, protected carboxy, carboxymethyl, protected carboxymethyl, hydroxymethyl, protected hydroxymethyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, carboxamide, protected carboxamide, N-(C, to C 6 alkyl)carboxamide, protected N-(C, to C 5 alkyl)carboxamide, N, N-di ⁇ to C 6 alkyl)carboxamide, trifluoromethyl, N-((C, to
• substituted phenyl examples include a mono- or di(halo)phenyl group such as 2, 3 or 4-chlorophenyl, 2,6-dichlorophenyl, 2,5- dichlorophenyl, 3,4-dichlorophenyl, 2, 3 or 4-bromophenyl, 3,4-dibromophenyl, 3- chloro-4-fluorophenyl, 2, 3 or 4-fluorophenyl and the like; a mono or di(hydroxy)phenyl group such as 2, 3 or 4-hydroxyphenyl, 2,4-dihydroxyphenyl, the protected-hydroxy derivatives thereof and the like; a nitrophenyl group such as 2, 3 or 4-nitrophenyl; a cyanophenyl group, for example, 2, 3 or 4-cyanophenyl; a mono- or di(alkyl)phenyl group such as 2, 3 or 4-methylphenyl, 2,4-dimethylphenyl, 2, 3 or 4- (iso-propyl)phenyl group
• substituted phenyl represents disubstituted phenyl groups wherein the substituents are different, for example, 3 -methyl -4-hydroxyphenyl, 3-chloro-4- hydroxyphenyl, 2-methoxy-4-bromophenyl, 4-ethyl-2-hydroxyphenyl, 3-hydroxy-4- nitrophenyl, 2-hydroxy 4-chlorophenyl and the like.
• phenylene means a phenyl group where the phenyl radical is bonded at two positions connecting together two separate additional groups. Examples of “phenylene” include 1,2-phenyl, 1,3-phenyl, and 1,4-phenyl.
• substituted phenylene means a phenyl group where the phenyl radical is bonded at two positions connecting together two separate additional groups.
• substituted phenylene include 3-chloro-l,2-phenyl, 4-amino-l,3- phenyl, and 3-hydroxy-l,4-phenyl.
• phenoxy denotes a phenyl bonded to an oxygen atom provided that the phenoxy is bonded to the quinoline ring through the oxygen atom as opposed to a carbon atom ofthe phenyl ring.
• substituted phenoxy specifies a phenoxy group substituted with one or more, and preferably one or two, moieties chosen from the groups consisting of halogen, hydroxy, protected hydroxy, cyano, nitro, C, to C 6 alkyl, C, to C 7 alkoxy, C ⁇ to C 7 substituted alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, carboxy, protected carboxy, carboxymethyl, protected carboxymethyl, hydroxymethyl, protected hydroxymethyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, carboxamide, protected carboxamide, N-(C,
• substituted phenoxy examples include 2-methylphenoxy, 2- ethylphenoxy, 2-propylphenoxy, 2-isopropylphenoxy, 2-sec-butylphenoxy, 2-tert- butylphenoxy, 2-allylphenoxy, 2-propenylphenoxy, 2-cyclopentylphenoxy, 2- fluorophenoxy, 2-(trifluoromethyl)phenoxy, 2-chlorophenoxy, 2-bromophenoxy, 2- methoxyphenoxy, 2-ethoxyphenoxy, 2-isopropoxyphenoxy, 3-methylphenoxy, 3- ethylphenoxy, 3-isopropylphenoxy, 3-tert-butylphenoxy, 3-pentadecylphenoxy, 3- (trifluoromethyl)phenoxy, 3-fluorophenoxy, 3-chlorophenoxy, 3-bromophenoxy, 3- iodophenoxy, 3-methoxyphenoxy, 3-(trifluoromethoxy)phenoxy, 4-methylphenoxy, 4- ethylphenoxy, 4-propy
• C 7 to C 12 phenylalkoxy denotes a C 7 to C 12 phenylalkoxy group, provided that the phenylalkoxy is bonded to the quinoline ring through the oxygen atom.
• C 7 to C 12 substituted phenylalkoxy is meant C 7 to C 12 phenylalkoxy group which can be substituted on the C, to C 6 alkyl portion with one or more, and preferably one or two, groups chosen from halogen, hydroxy, protected hydroxy, oxo, protected oxo, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, guanidino, heterocyclic ring, substituted heterocyclic ring, C, to C 7 alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, nitro, carboxy, protected carboxy, carbamoyl,
• C 7 to C 12 substituted phenylalkoxy examples include groups such as 2-(4-hydroxyphenyl)ethoxy, 4-(4-methoxyphenyl)butoxy, (2R)-3- phenyl-2-amino-propoxy, (2S)-3-phenyl-2-amino-propoxy, 2-indanoxy, 6-phenyl-l- hexanoxy, cinnamyloxy, (+/-)-2-phenyl-l-propoxy, 2,2-dimethyl-3-phenyl-l-propoxy and the like.
• phthalimide means a cyclic imide which is made from phthalic acid, also called 1, 2 benezene-dicarboxylic acid.
• substituted phthalimide specifies a phthalimide group substituted with one or more, and preferably one or two, moieties chosen from the groups consisting of halogen, hydroxy, protected hydroxy, cyano, nitro, C, to C 6 alkyl, C, to C 7 alkoxy, C, to C 7 substituted alkoxy, Cj to C 7 acyl, C, to C 7 acyloxy, carboxy, protected carboxy, carboxymethyl, protected carboxymethyl, hydroxymethyl, protected hydroxymethyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, carboxamide, protected carboxamide, N-(C, to C 6 alkyl)carboxamide, protected N-(C, to C, to C
• substituted phthalimides examples include 4,5-dichlorophthalimido, 3-fluorophthalimido, 4-methoxyphthalimido, 3-methylphthalimido, 4- carboxyphthalimido and the like.
• substituted naphthyl specifies a naphthyl group substituted with one or more, and preferably one or two, moieties either on the same ring or on different rings chosen from the groups consisting of halogen, hydroxy, protected hydroxy, cyano, nitro, C, to C 6 alkyl, C, to C 7 alkoxy, C, to C 7 acyl, C, to C 7 acyloxy, carboxy, protected carboxy, carboxymethyl, protected carboxymethyl, hydroxymethyl, protected hydroxymethyl, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, carboxamide, protected carboxamide, N-(C, to C 6 alkyl)carboxamide, protected N-(C, to C 6 alkyl)carboxamide, N, N-di(C, to C 6 alkyl)carboxamide, trifluoromethyl, N-((((((C,
• substituted naphthyl examples include a mono or di(halo)naphthyl group such as 1, 2, 3, 4, 5, 6, 7 or 8-chloronaphthyl, 2, 6-dichloronaphthyl, 2, 5- dichloronaphthyl, 3, 4-dichloronaphthyl, 1, 2, 3, 4, 5, 6, 7 or 8-bromonaphthyl, 3, 4- dibromonaphthyl, 3-chloro-4-fluoronaphthyl, 1, 2, 3, 4, 5, 6, 7 or 8-fluoronaphthyl and the like; a mono or di(hydroxy)naphthyl group such as 1, 2, 3, 4, 5, 6, 7 or 8- hydroxynaphthyl, 2, 4-dihydroxynaphthyl, the protected-hydroxy derivatives thereof and the like; a nitronaphthyl group such as 3- or 4-nitronaphthyl; a cyanonaphthy
• substituted naphthyl represents disubstituted naphthyl groups wherein the substituents are different, for example, 3- methyl-4-hydroxynaphth- 1 -yl, 3 -chloro-4-hydroxynaphth-2-yl, 2-methoxy-4- bromonaphth- 1 -yl, 4-ethyl-2-hydroxynaphth- 1 -yl, 3-hydroxy-4-nitronaphth-2-yl, 2- hydroxy-4-chloronaphth- 1 -yl, 2-methoxy-7-bromonaphth- 1 -yl, 4-ethyl-5- hydroxynaphth-2-yl, 3-hydroxy-8-nitronaphth-2-yl, 2-hydroxy-5-chloronaphth- 1 -yl and the like.
• halo and halogen refer to the fluoro, chloro, bromo or iodo groups. There can be one or more halogen, which are the same or different. Preferred halogens are chloro and fluoro.
• (monosubstituted)amino refers to an amino group with one substituent chosen from the group consisting of phenyl, substituted phenyl, C, to C 6 alkyl, C, to C 6 substituted alkyl, C, to C 7 acyl, C 2 to C 7 alkenyl, C 2 to C 7 substituted alkenyl, C 2 to C 7 alkynyl, C 2 to C 7 substituted alkynyl, C 7 to C 12 phenylalkyl, C 7 to C 12 substituted phenylalkyl and heterocyclic ring.
• the (monosubstituted)amino can additionally have an amino-protecting group as encompassed by the term "protected (monosubstituted)amino.”
• (disubstituted)amino refers to amino groups with two substituents chosen from the group consisting of phenyl, substituted phenyl, C, to C 6 alkyl, C, to C 6 substituted alkyl, C, to C 7 acyl, C 2 to C 7 alkenyl, C 2 to C 7 alkynyl, C 7 to C 12 phenylalkyl, and C 7 to C 12 substituted phenylalkyl.
• the two substituents can be the same or different.
• amino-protecting group refers to substituents ofthe amino group commonly employed to block or protect the amino functionality while reacting other functional groups ofthe molecule.
• protected (monosubstituted)amino means there is an amino-protecting group on the (monosubstituted)amino nitrogen atom.
• protected carboxamide means there is an amino-protecting group on the carboxamide mtrogen.
• amino-protecting groups include the formyl ("For") group, the trityl group, the phthalimido group, the trichloroacetyl group, the chloroacetyl, bromoacetyl, and iodoacetyl groups, urethane-type blocking groups, such as t-butoxycarbonyl ("Boc”), 2-(4-biphenylyl)propyl-2-oxycarbonyl ("Bpoc”), 2- phenylpropyl-2-oxycarbonyl (“Poc”), 2-(4-xenyl)isopropoxycarbonyl, 1,1- diphenylethyl-1 -oxycarbonyl, 1,1-diphenylpropyl-l -oxycarbonyl, 2-(3,5- dimethoxyphenyl)propyl-2-oxycarbonyl (“Ddz”), 2-(p-toluyl)propyl-2-oxycarbonyl, cyclopentanyloxycarbonyl,
• amino-protecting group employed is not critical so long as the derivatized amino group is stable to the conditions ofthe subsequent reaction(s) and can be removed at the appropriate point without disrupting the remainder ofthe compounds.
• Preferred amino-protecting groups are Boc, Cbz and Fmoc.
• Further examples of amino-protecting groups embraced by the above term are well known in organic synthesis and the peptide art and are described by, for example, T.W. Greene and P.G.M. Wuts, "Protective Groups in Organic Synthesis," 2nd ed., John Wiley and Sons, New York, NY, 1991, Chapter 7, M.
• carboxy-protecting group refers to one ofthe ester derivatives ofthe carboxylic acid group commonly employed to block or protect the carboxylic acid group while reactions are carried out on other functional groups on the compound.
• carboxylic acid protecting groups include t-butyl, 4- nitrobenzyl, 4-methoxybenzyl, 3,4-dimethoxybenzyl, 2,4-dimethoxybenzyl, 2,4,6- trimethoxybenzyl, 2,4,6-trimethylbenzyl, pentamethylbenzyl, 3,4- methylenedioxybenzyl, benzhydryl, 4,4'-dimethoxytrityl, 4,4 , ,4"-trimethoxytrityl, 2- phenylpropyl, trimethylsilyl, t-butyldimethylsilyl, phenacyl, 2,2,2-trichloroethyl, ⁇ - (trimethylsi ⁇ yl)ethyl, ⁇ -(
• carboxy-protecting group employed is not critical so long as the derivatized carboxylic acid is stable to the conditions of subsequent reaction(s) and can be removed at the appropriate point without disrupting the remainder ofthe molecule. Further examples of these groups are found in E. Haslam, "Protective Groups in Organic Chemistry,” J.G.W. McOmie, Ed., Plenum Press, New York, NY, 1973, Chapter 5, and T.W. Greene and P.G.M. Wuts, "Protective Groups in Organic Synthesis," 2nd ed., John Wiley and Sons, New York, NY, 1991, Chapter 5, each of which is incorporated herein by reference. A related term is "protected carboxy,” which refers to a carboxy group substituted with one ofthe above carboxy-protecting groups.
• hydroxy-protecting group refers to readily cleavable groups bonded to hydroxyl groups, such as the tetrahydropyranyl, 2-methoxypropyl, 1- ethoxyethyl, methoxymethyl, 2-methoxyethoxymethyl, methylthiomethyl, t-butyl, t- amyl, trityl, 4-methoxytrityl, 4,4'-dimethoxytrityl, 4,4',4"-trimethoxytrityl, benzyl, allyl, trimethylsilyl, (t-butyl)dimethylsilyl, 2,2,2-trichloroethoxycarbonyl groups and the like.
• hydroxy-protecting group is not critical so long as the derivatized hydroxyl group is stable to the conditions of subsequent reaction(s) and can be removed at the appropriate point without disrupting the remainder ofthe molecule.
• Further examples of hydroxy-protecting groups are described by C.B. Reese and E. Haslam, "Protective Groups in Organic Chemistry,” J.G.W. McOmie, Ed., Plenum Press, New York, NY, 1973, Chapters 3 and 4, respectively, and T.W. Greene and P.G.M. Wuts, "Protective Groups in Organic Synthesis," 2nd ed., John Wiley and Sons, New York, NY, 1991, Chapters 2 and 3.
• C to C 4 alkylthio refers to sulfide groups such as methylthio, ethylthio, n-propylthio, isopropylthio, n-butylthio, t-butylthio and like groups.
• C, to C 4 alkylsulfoxide indicates sulfoxide groups such as methylsulfoxide, ethylsulfoxide, n-propylsulfoxide, isopropylsulfoxide, n-butylsulfoxide, sec-butylsulfoxide and the like.
• C, to C 4 alkylsulfonyl encompasses groups such as methylsulfonyl, ethylsulfonyl, n-propylsulfonyl, isopropylsulfonyl, n-butylsulfonyl, t- butylsulfonyl and the like.
• C, to C 4 substituted alkylthio C, to C 4 substituted alkylsulfoxide
• C, to C 4 substituted alkylsulfonyl denote the C, to C 4 alkyl portion of these groups may be substituted as described above in relation to "substituted alkyl.”
• phenylthio phenylsulfoxide
• phenylsulfonyl specify a thiol, a sulfoxide, or sulfone, respectively, containing a phenyl group.
• substituted phenylthio substituted phenylsulfoxide
• substituted phenylsulfonyl mean that the phenyl of these groups can be substituted as described above in relation to "substituted phenyl.”
• C, to C 6 alkylaminocarbonyl means a C, to C 6 alkyl attached to an aminocarbonyl group, where the C, to C 6 alkylaminocarbonyl groups are the resulting urea when an isocyanate is used in the reaction scheme.
• Examples of C, to C 6 alkylaminocarbonyl include methylaminocarbonyl (from methylisocyanate), ethylaminocarbonyl (from ethylisocyanate), propylaminocarbonyl (from propylisocyanate), butylaminocarbonyl (from butylisocyatate).
• C, to Cg substituted alkylaminocarbonyl denotes a substituted alkyl bonded to an aminocarbonyl group, which alkyl may be substituted as described above in relation to C, to Cg substituted alkyl.
• Examples of C, to C 6 substituted alkylaminocarbonyl include, for example, methoxymethylaminocarbonyl (from methoxymethylisocyanate), 2-chloroethylaminocarbonyl (from 2- chloroethylisocyanate), 2-oxopropylaminocarbonyl (from 2-oxopropylisocyanate), and 4-phenylbutylaminocarbonyl (from phenylbutylisocyanate).
• phenylaminocarbonyl means a phenyl attached to an aminocarbonyl group, where the phenylaminocarbonyl groups are the result of using a phenylisocyanate in the reaction scheme.
• substituted phenylaminocarbonyl denotes a substituted phenyl bonded to an aminocarbonyl group, which phenyl may be substituted as described above in relation to substituted phenyl.
• substituted phenylaminocarbonyl examples include 2- chlorophenylaminocarbonyl (from 2-chlorophenylisocyanate), 3- chlorophenylaminocarbonyl (from 3-chlorophenylisocyanate), 2- nitorphenylaminocarbonyl (from 2-nitrophenylisocyanate), 4-biphenylaminocarbonyl (from 4-biphenylisocyanate), and 4-methoxyphenylaminocarbonyl (from 4- methoxyphenylisocyanate).
• cyclic C 2 to C 7 alkylene "substituted cyclic C 2 to C 7 alkylene,” “cyclic C 2 to C 7 heteroalkylene,” and “substituted cyclic C 2 to C 7 heteroalkylene” define such a cyclic group bonded (“fused") to the phenyl radical resulting in a bicyclic ring system.
• the cyclic group may be saturated or contain one or two double bonds.
• the cyclic group may have one or two methylene or methine groups replaced by one or two oxygen, nitrogen or sulfur atoms which are the cyclic C 2 to C 7 heteroalkylene.
• the cyclic alkylene or heteroalkylene group may be substituted once or twice by the same or different substituents selected from the group consisting ofthe following moieties: hydroxy, protected hydroxy, carboxy, protected carboxy, oxo, protected oxo, C, to C 4 acyloxy, formyl, C, to C 7 acyl, C, to C 6 alkyl, C, to C 7 alkoxy, C, to C 4 alkylthio, C, to C 4 alkylsulfoxide, C, to C 4 alkylsulfonyl, halo, amino, protected amino, (monosubstituted)amino, protected (monosubstituted)amino, (disubstituted)amino, hydroxymethyl and a protected hydroxymethyl.
• the cyclic alkylene or heteroalkylene group fused onto the benzene radical can contain two to ten ring members, but it preferably contains three to six members.
• saturated cyclic groups are when the resultant bicyclic ring system is 2,3-dihydro-indanyl and a tetralin ring.
• unsaturated examples occur when the resultant bicyclic ring system is a naphthyl ring or indolyl.
• fused cyclic groups which each contain one nitrogen atom and one or more double bond, preferably one or two double bonds, are when the phenyl is fused to a pyridino, pyrano, pyrrolo, pyridinyl, dihydropyrrolo, or dihydropyridinyl ring.
• fused cyclic groups which each contain one oxygen atom and one or two double bonds are when the phenyl ring is fused to a furo, pyrano, dihydrofurano, or dihydropyrano ring.
• fused cyclic groups which each have one sulfur atom and contain one or two double bonds are when the phenyl is fused to a thieno, thiopyrano, dihydrothieno or dihydrothiopyrano ring.
• cyclic groups which contain two heteroatoms selected from sulfur and nitrogen and one or two double bonds are when the phenyl ring is fused to a thiazolo, isothiazolo, dihydrothiazolo or dihydroisothiazolo ring.
• Examples of cyclic groups which contain two heteroatoms selected from oxygen and nitrogen and one or two double bonds are when the benzene ring is fused to an oxazolo, isoxazolo, dihydrooxazolo or dihydroisoxazolo ring.
• Examples of cyclic groups which contain two nitrogen heteroatoms and one or two double bonds occur when the benzene ring is fused to a pyrazolo, imidazolo, dihydropyrazolo or dihydroimidazolo ring or pyrazinyl.
• salt encompasses those salts that form with the carboxylate anions and amine nitrogens and include salts formed with the organic and inorganic anions and cations discussed below. Furthermore, the term includes salts that form by standard acid-base reactions with basic groups (such as amino groups) and organic or inorganic acids.
• Such acids include hydrochloric, sulfuric, phosphoric, acetic, succinic, citric, lactic, maleic, fumaric, palmitic, cholic, pamoic, mucic, D-glutamic, D-camphoric, glutaric, phthalic, tartaric, lauric, stearic, salicyclic, methanesulfonic, benzenesulfonic, sorbic, picric, benzoic, cinnamic, and like acids.
• organic or inorganic cation refers to counterions for the carboxylate anion of a carboxylate salt.
• the counter-ions are chosen from the alkali and alkaline earth metals, (such as lithium, sodium, potassium, barium, aluminum and calcium); ammonium and mono-, di- and tri-alkyl amines such as trimethylamine, cyclohexylamine; and the organic cations, such as dibenzylammonium, benzylammonium, 2-hydroxyethylammonium, bis(2-hydroxyethyl)ammonium, phenylethylberizylammoriium, dibenzylethylenediammonium, and like cations.
• the compounds ofthe above Formulae can also exist as solvates and hydrates. Thus, these compounds may crystallize with, for example, waters of hydration, or one, a number of, or any fraction thereof of molecules ofthe mother liquor solvent.
• the solvates and hydrates of such compounds are included within the scope of this invention.
• One or more 4-substituted quinoline derivatives can be in the biologically active ester form, such as the non-toxic, metabolically-labile ester-form.
• ester forms induce increased blood levels and prolong the efficacy ofthe corresponding non-esterified forms ofthe compounds.
• Ester groups which can be used include the lower alkoxymethyl groups, for example, methoxymethyl, ethoxymethyl, isopropoxymethyl and the like; the ⁇ -(C, to C 7 ) alkoxyethyl groups, for example methoxyethyl, ethoxyethyl, propoxyethyl, isopropoxyethyl and the like; the 2-oxo-l,3-diooxlen-4-ylmethyl groups, such as 5- methyl-2-oxo-l ,3-diooxlen-4-ylmethyl, 5-phenyl-2-oxo-l ,3-diooxlen-4-ylmethyl and the like; the C, to C 4 alkylthiomethyl groups, for example methylthiomethyl, ethylthiomethyl, iso-propylthiomethyl and the like; the acyloxymethyl groups, for example pivaloyloxymethyl, pivaloyloxyethyl
• amino acid includes any one ofthe twenty naturally- occurring amino acids or the D-form of any one ofthe naturally-occurring amino acids.
• amino acid also includes other non-naturally occurring amino acids besides the D-amino acids, which are functional equivalents ofthe naturally-occurring amino acids.
• non-naturally-occurring amino acids include, for example, norleucine ("Nle”), norvaline (“Nva”), ⁇ -Alanine, L- or D-naphthalanine, omithine (“Orn”), homoarginine (homoArg) and others well known in the peptide art, such as those described in M.
• amino acids are indicated herein by either their full name or by the commonly known three letter code. Further, in the naming of amino acids, "D-" designates an amino acid having the "D" configuration, as opposed to the naturally occurring L-amino acids. Where no specific configuration is indicated, one skilled in the art would understand the amino acid to be an L-amino acid.
• the amino acids can, however, also be in racemic mixtures ofthe D- and L-configuration or the D-amino acid can readily be substituted for that in the L-configuration.
• a chemical or combinatorial "library” is an intentionally created collection of differing molecules which can be prepared by the synthetic means provided below or otherwise and screened for biological activity in a variety of formats (e.g., libraries of soluble molecules, libraries of compounds attached to resin beads, silica chips or other solid supports).
• the libraries can be screened in any variety of assays, such as those detailed below as well as others useful for assessing the biological activity.
• the libraries are useful in their ability to rapidly synthesize and screen a diverse number or compounds.
• the libraries will generally have at least one active compound and are generally prepared in such that the compounds are in equimolar quantities.
• Combinatorial chemistry or “combinatorial synthesis” refers to the parallel synthesis of diverse compounds by sequential addition of reagents which leads to the generation of large chemical libraries having molecular diversity. Combinatorial chemistry, therefore, involves the systematic and repetitive, covalent connection of a set of different "building blocks" of varying structures to yield large arrays of diverse molecular entities.
• the compounds of Formula I and combinatorial libraries containing the same can be prepared as set forth in the Reaction Schemes provided in the Figures and described below.
• the substituents R 1 to R 9 in the Reaction Schemes have the same meaning as those described above.
• the substituent Y in the Reaction Schemes is the same as defined above with the exception that it is still bound to resin or is the functionalized resin and, therefore, has one less hydrogen.
• the 4-substituted quinoline compounds ofthe present invention can be prepared according to Reaction Scheme I as shown in Figure 1.
• a solid support resin-bound aniline (1) (resin identified by a shaded circle) is reacted, in situ, with an aldehyde (2) and is thereby, converted to the corresponding imine (3).
• the 4- substituted quinolines and libraries containing the same are prepared by the following more detailed steps.
• the anilines are coupled to resin, such as MBHA ( Figure 2), MBA, TentagelTM and the like as described below, using a carbodiimide coupling agent, such as dicyclohexylcarbodiimide, diisopropyl- carbodiimide, N-dimethylaminoethyl-N'- ethyl-carbodiimide and the like, and an activator, such as 1-hydroxybenzotriazole, 7-aza-l-hydroxybenzotriazole and the like, in an aprotic polar solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25 °C, for 2 to 24 hours, preferably 8 to 16 hours.
• aprotic polar solvent such as dichloromethane, dimethylformamide and the like
• the protecting group ("PG") ofthe ⁇ -amino group is removed using a strong acid such as trifluoroacetic acid or trifluoromethanesulfonic acid and the like (1-95%) or using an amine base such as piperidine, pyrrolidine, or morpholine and the like (1- 95% ⁇ ) in an aprotic solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25°C, for 2 to 24 hours, preferably 8 to 16 hours.
• a strong acid such as trifluoroacetic acid or trifluoromethanesulfonic acid and the like (1-95%) or using an amine base such as piperidine, pyrrolidine, or morpholine and the like (1- 95% ⁇ ) in an aprotic solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25°C, for 2 to 24 hours, preferably 8 to 16 hours.
• the free amino group ofthe individual or mixtures of resin-bound anilines is condensed with an aldehyde in the presence of a dieneophile, such as 4- methoxystyrene, 3,5-dimethoxystyrene, N-vinylpyrrolidine, N-methyl-N- vinylpyrrolidine and the like and an acid, such as trifluoroacetic acid, toluenesulfonic acid and the like, using in a polar solvent, such as dichloromethane, dimethylformamide, dimethylacetamide, N-methylpyrrolidinone or the like, for a period of 1 to 72 hours, usually 12 to 24 hours at 20° C to 75° C and preferably at 25 °C to arrive at novel 4-substituted quinoline derivatives.
• a dieneophile such as 4- methoxystyrene, 3,5-dimethoxystyrene, N-vinylpyrrolidine, N-methyl-N- vinylpyrrolidine and the like
• N-Boc-nitrophenylalanines or, alternatively, the FMOC protected analogs are coupled to resin, such as MB HA, MBA, TentagelTM and the like as described below, using a carbodiimide coupling agent, such as dicyclohexylcarbodiimide, diisopropyl-carbodiimide, N-dimethylaminoethyl-N'-ethyl-carbodiimide and the like, and an activator, such as 1 -hydroxybenzotriazole, 7-aza- 1 -hydroxybenzotriazole and the like, in an aprotic polar solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25°C, for 2 to 24 hours, preferably 8 to 16 hours.
• aprotic polar solvent such as dichloromethane, dimethylformamide and the like
• the BOC ofthe ⁇ -amino group is removed using a strong acid such as trifluoroacetic acid or trifluoromethanesulfonic acid and the like (1-95%) in an aprotic solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25 °C, for 2 to 24 hours, preferably 8 to 16 hours.
• a strong acid such as trifluoroacetic acid or trifluoromethanesulfonic acid and the like
• the FMOC ofthe ⁇ amino acid is removed using an amine base such as piperidine, pyrrolidine, or morpholine and the like (1-95%) in an aprotic solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25 °C, for 2 to 24 hours, preferably 8 to 16 hours.
• an amine base such as piperidine, pyrrolidine, or morpholine and the like
• the free amino group are coupled to a carboxylic acid, such as acetic acid, benzoic acid and the like ( Figure 3), using a carbodiimide coupling agent, such as dicyclohexylcarbodiimide, diisopropyl-carbodiimide, N-dimethylaminoethyl-N'-ethyl-carbodiimide and the like, and an activator, such as 1 -hydroxybenzotriazole, 7-aza-l -hydroxybenzotriazole and the like, in an aprotic polar solvent such as dichloromethane, dimethylformamide and the like, at between 10°C and 100°C, preferably at 25°C, for 2 to 24 hours, preferably 8 to 16 hours.
• a carbodiimide coupling agent such as dicyclohexylcarbodiimide, diisopropyl-carbodiimide, N-dimethylaminoethyl-N'-ethyl-carbod
• the nitro group ofthe phenylalanine is subjected to conditions to reduce the nitro group to an amine, in the case of Reaction Scheme III tin dichloride, in an aprotic solvent such as chloroform, dimethylformamide, dimethylacetamide, N-methylpyrrolidinone for 2 to 36 hours and preferably 16 hours at 20 °C to 125 °C, preferably at 25-30°C.
• an aprotic solvent such as chloroform, dimethylformamide, dimethylacetamide, N-methylpyrrolidinone
• the free amino group ofthe individual or mixtures of resin- bound aminophenylalanines is condensed with an aldehyde in the presence of a dieneophile, such as 4-methoxystyrene, 3,5-dimethoxystyrene, N-vinylpyrrolidine, N- methyl-N-vinylpyrrolidine and the like, and an acid such as trifluoroacetic acid or toluenesulfonic acid and the like, using in a polar solvent, such as dichloromethane, dimethylformamide, dimethylacetamide, N-methylpyrrolidinone or the like, for a period of 1 to 72 hours, usually 12 to 24 hours at 20° C to 75° C and preferably at 25 °C to arrive at novel 4-substituted quinoline derivatives.
• a dieneophile such as 4-methoxystyrene, 3,5-dimethoxystyrene, N-vinylpyrrolidine, N- methyl-N
• the compounds can be cleaved from the resin by the methods common to those skilled in the art and the compounds tested for biological activity. It should be appreciated by those of skill in the art that with certain resins, cleavage from the resin results in the functional group on the resin coming off the resin and being maintained with the cleaved compounds. For example, with an amino-resin, such as methylbenzhydrylamine resin, the amine group from the resin is cleaved off the resin and makes the 4-substituted quinoline(s) of interest an amide.
• an amino-resin such as methylbenzhydrylamine resin
• the term "functionalized resin” means any resin where functional groups have been introduced into the resin, as is common in the art. Such resins include, for example, those functionalized with amino, amide, or hydroxy groups. Such resins which can serve as solid supports are well known in the art and include, for example, 4-methylbenzhydrylamine-copoly(styrene-l% divinylbenzene) (MB HA), 4-hydroxymethylphenoxymethyl-copoly(styrene- 1 % divinylbenzene), 4-oxymethyl-phenyl-acetamido-copoly(styrene- 1 % divinylbenzene)(Wang), 4- (oxymethyl)-phenylacetamido methyl (Pam), TentagelTM, from Rapp Polymere Gmbh, and trialkoxy-diphenyl-methyl ester- copoly(styrene-l% divinylbenzene) (RINK) all of which are commercially available.
• MB HA 4-
• split resin approach Preparation ofthe combinatorial libraries can be by the "split resin approach."
• the split resin approach is described by, for example, U.S. Patent 5,010,175 to Rutter, WO PCT 91/19735 to Simon, and Gallop et al., J. Med. Chem., 37:1233-1251 (1994), all of which are incorporated herein by reference.
• amino carboxylic acids which can be used in the above Reaction Schemes include 2, 3, and 4-aminobenzoic acid, aminohippuric acid, 4'- aminophenylalanine, 4'-nitrophenylalanine, anthranilic acid (2-aminobenzoic acid), 2- amino-4-chlorobenzoic acid, 2-amino-4-fluorobenzoic acid, 4-nitroanthranilic acid, 2- amino-5-bromobenzoic acid, 2-amino-5-chlorobenzoic acid, 2-amino-5-fluorobenzoic acid, 2-amino-5-iodobenzoic acid, 2-amino-5 -methylbenzoic acid, 2-amino-6- methylbenzoic acid, 4,5-difluoroanthranilic acid, 3-amino-2-naphthoic acid, 4- aminobenzoic acid, 4-amino-2-chlorobenzoic acid, 4-amino-2-hydroxybenzoic acid, 4-amino-3
• aldehydes which can be used in the above Reaction Schemes I and II are glyoxylic acid, 1-napthaldehyde, 2,3,4-trifluorobenzaldehyde, 2,3,5-trichlorobenzaldehyde, 2,3-difluorobenzaldehyde, 2,4-dichlorobenzaldehyde, 2,5-difluorobenzaldehyde, 2,5-dimethylbenzaldehyde, 2,6-difluorobenzaldehyde, 2- bromobenzaldehyde, 2-chloro-5-nitrobenzaldehyde, 2-fluorobenzaldehyde, 3,4- (methylenedioxy)-6-nitrobenzaldehyde (6-nitropiperonal), 3 ,4-difluorobenzaldehyde, 3,5-bis(trifluoromethyl)benzaldehyde, 3,5-dichlorobenzaldehyde, 3- cyanobenzalde
• Additional aldehydes include the following, 2-nitrobenzaldehyde, 2, 4- dinitrobenzaldehyde, 4-methyl-2-nitrobenzaldehyde, 4,5-methylenedioxy-2- nitrobenzaldehyde, 5-ethyl-2-nitrobenzaldehyde, 4,5-dimethoxy-2-nitrobenzaldehyde, 5-chloro-2-nitrobenzaldehyde, 3-fluoro-2-nitrobenzaldehyde, 3-trifluoro-2- nitrobenzaldehyde, 4-(dimethylamino)-2-nitrobenzaldehyde, 3-methoxy-2- nitrobenzaldehyde, 5-hydroxy-2-nitrobenzaldehyde, 2,6-dinitrobenzaldehyde and the like.
• Exemplary carboxylic acid which can be used in the above Reaction Schemes include, but are not limited to, acetic acid, butyric acid, cyclobutanecarboxylic acid, cycloheptanecarboxylic acid, cyclohexanebutyric acid, cyclohexanecarboxylic acid, cyclohexanepropionic acid, cyclohexylacetic acid, cyclopentanecarboxylic acid, cyclopentylacetic acid, hydrocinnamic acid, isobutyric acid, isovaleric acid, octanoic acid, propionic acid, tert-butylacetic acid, trimethylacetic acid, 1-adamantaneacetic acid, 4-methyl-l -cyclohexanecarboxylic acid, 4-methylcyclohexaneacetic acid, 4-methylvaleric acid, 2-ethyl-2-hexenoic acid, 2-ethylbutyric acid, 2-ethy
• the 4-substituted quinolines of Formula II before cleavage from the resin, can be substituted at positions R 9 following Reaction Scheme IV provided in Figure 4.
• the 4-substituted quinoline prepared by the above Reaction Schemes I, II or III is condensed with a carboxylic acid, carboxylic acid anhydride, acid halide, alkyl halide or isocyanate in an aprotic solvent, such as dimethylformamide, dichloromethane, l-methyl-2- pyrrolidinone, N- N,-dimethylacetamide, tetrahydrofuran, dioxane and the like, in the presence of an acid acceptor, if desired, to furnish the substituted 4-substituted quinoline.
• an aprotic solvent such as dimethylformamide, dichloromethane, l-methyl-2- pyrrolidinone, N- N,-dimethylacetamide, tetrahydrofuran, dioxane and the
• preparation ofthe library containing alternatively substituted 4-substituted quinolines other than R 9 equal to a hydrogen atom involves, instead of cleaving from the resin, free NH ofthe newly formed 4-substituted quinoline compound being reacted with a carboxylic acid activated with N- [(dimethy lamino)- 1 H- 1 , 2, 3 -triazolo [4 ,5 -b]pyridin- 1 -y lmethy lene] -N- methylmethanaminium hexafluorophosphate N-oxide (HATU, PerSeptive Biosystems, Farmingham, MA), dissolved in dimethylformamide, N-N,- dimethylacetamide, l-methyl-2- pyrrolidinone and the like.
• HATU Hydrochloride
• reaction is allowed to proceed for 1 to 24 hours at 20 °C to 80 °C, preferably at 25 °C for 3 to 5 hours to yield various carboxamide derivatives. Finally, the compounds are cleaved from the resin as described above and tested for biological activity.
• Exemplary carboxylic acid, carboxylic acid anhydride, acid halide, alkyl halide or isocyanate which can be used include nalidixic acid, 2-phenyl-4- quinolinecarboxylic acid, 2-pyrazinecarboxylic acid, niflumic acid, 4-nitrophenylacetic acid, 4-(-nitrophenyl)butyric acid, (3,4-dimethoxyphenyl)acetic acid, 3,4-(methylenedioxy)phenylacetic acid, 4-nitrocinnamic acid, 3,4,-(methylenedioxy)cinnamic acid, 3,4,5-trimethoxycinnamic acid, benzoic acid, 2-chlorobenzoic acid, 2-nitrobenzoic acid, 2-(p-toluoyl)benzoic acid, 2,4-dinitrophenylacetic acid, 3-(3,4,5-trimethoxyphenyl)-proprionic acid, 4-biphenylacetic acid, 1-napthylacetic acid,
• R 9 is a hydrogen atom following Reaction Scheme V provided in Figure 5.
• the 4-substituted quinoline prepared by the above Reaction Schemes I, II or III is reacted with an oxidant, such as peracetic acid, meta-chloroperbenzoic acid, iodine in an aprotic solvent, such as dimethylformamide, dichloromethane, l-methyl-2- pyrrolidinone, N-N,- dimethylacetamide, tetrahydrofuran, dioxane and the like, to furnish the substituted quinoline.
• an oxidant such as peracetic acid, meta-chloroperbenzoic acid, iodine
• an aprotic solvent such as dimethylformamide, dichloromethane, l-methyl-2- pyrrolidinone, N-N,- dimethylacetamide, tetrahydrofuran, dioxane and the like
• compositions and medicaments containing the new 4- substituted quinoline derivatives are also included within the scope ofthe present invention, as are methods of using the compounds and compositions.
• the new 4- substituted quinoline compounds ofthe present invention can be used for a variety of purposes and indications. For instance, related tetrahydroquinolines have been reported to N-methyl-D-aspartate (NMD A) receptor site antagonists and, therefore, useful in reducing ischemic brain damage as described, for example, in Leeson et al., J. Med. Chem.. 35:1954 (1992), which is incorporated herein by reference.
• NMD A N-methyl-D-aspartate
• the ability ofthe compounds to inhibit bacterial growth can be determined by methods well known in the art.
• An exemplary in vitro antimicrobial activity assay is described in Blondelle and Houghten,
• Staphylococcus aureus ATCC 29213 (Rockville, MD) is grown overnight at 37 °C in Mueller-Hinton broth, then re-inoculated and incubated at 37 °C to reach the exponential phase of bacterial growth (i.e., a final bacterial suspension containing 10 5 to 5 x 10 5 colony-forming units/ml).
• the concentration of cells is established by plating 100 ⁇ l ofthe culture solution using serial dilutions (e.g., 10 "2 , 10 "3 and 10 "4 ) onto solid agar plates.
• 96-well tissue culture plates 4-substituted quinolines, individual or in mixtures, are added to the bacterial suspension at concentrations derived from serial two-fold dilutions ranging from 1500 to 2.9 ⁇ g/ml. The plates are incubated overnight at 37 °C and the growth determined at each concentration by OD 620 nm. The IC 50 (the concentration necessary to inhibit 50%) ofthe growth ofthe bacteria) can then be calculated.
• Additional assays can be used to test the biological activity ofthe instant 4-substituted quinolines.
• the latter test, the radio-receptor assay can be selective for either the ⁇ , ⁇ or K opiate receptors and is therefore an indication of 4-substituted quinolines' analgesic properties.
• ELISA Competitive Enzyme-Linked Immunosorbent Assay
• Radio-Receptor Assay Particulate membranes can be prepared using a modification ofthe method described in Pasternak et al., Mol. Pharmacol. 11 :340-351 (1975), which is incorporated herein by reference.
• Rat brains frozen in liquid nitrogen can be obtained from Rockland (Gilbertsville, PA). The brains are thawed, the cerebella removed and the remaining tissue weighed. Each brain is individually homogenized in 40 ml Tris-HCl buffer (50 mM, pH 7.4, 4°C) and centrifuged (Sorvall ® RC5C SA-600: Du Pont, Wilmington, DE) (16,000 rpm) for 10 mins.
• the pellets are resuspended in fresh Tris-HCl buffer and incubated at 37° C for 40 mins. Following incubation, the suspensions are centrifuged as before, the resulting pellets resuspended in 100 volumes of Tris buffer and the suspensions combined. Membrane suspensions are prepared and used in the same day. Protein content ofthe crude homogenates generally range from 0.15-0.2 mg/ml as determined using the method described in M.M. Bradford, M.M., Anal. Biochem. 72:248-254 (1976), which is incorporated herein by reference.
• reaction is terminated by filtration through GF-B filters on a Tomtec harvester (Orange, CT). The filters are subsequently washed with 6 ml of Tris-HCl buffer, 4°C. Bound radioactivity is counted on a Pharmacia Biotech Betaplate Liquid Scintillation Counter (Piscataway, NJ) and expressed in cpm.
• standard curves in which 3 H-DAMGO is incubated in the presence of a range of concentrations of unlabeled DAMGO (0.13-3900 nM) are generally included in each plate of each assay (a 96-well format).
• ⁇ receptor selective assays can be carried out using [ 3 H]-Naltrindole (3 nM, specific activity 32 Ci/mmol as radioligand or, alternatively, assays selective for K receptors can be carried out using [ 3 H]-U69,593 (3 nM, specific activity 62 Ci/mmol) as radioligand.
• the 4-substituted quinoline compounds ofthe present invention are generally in a pharmaceutical composition so as to be administered to a subject at dosage levels of from 0.7 to 7000 mg per day, and preferably 1 to 500 mg per day, for a normal human adult of approximately 70 kg of body weight, this translates into a dosage of from 0.01 to 100 mg/kg of body weight per day.
• the specific dosages employed, however, can be varied depending upon the requirements ofthe patient, the severity ofthe condition being treated, and the activity ofthe compound being employed. The determination of optimum dosages for a particular situation is within the skill of the art.
• inert, pharmaceutically acceptable carriers are used.
• the pharmaceutical carrier can be either solid or liquid.
• Solid form preparations include, for example, powders, tablets, dispersible granules, capsules, cachets, and suppositories.
• a solid carrier can be one or more substances which can also act as diluents, flavoring agents, solubilizers, lubricants, suspending agents, binders, or tablet disintegrating agents; it can also be an encapsulating material.
• the carrier is generally a finely divided solid which is in a mixture with the finely divided active component.
• the active compound is mixed with the carrier having the necessary binding properties in suitable proportions and compacted in the shape and size desired.
• a low-melting wax such as a mixture of fatty acid glycerides and cocoa butter is first melted and the active ingredient is dispersed therein by, for example, stirring. The molten homogeneous mixture is then poured into convenient-sized molds and allowed to cool and solidify.
• Powders and tablets preferably contain between about 5% to about 70%) by weight ofthe active ingredient.
• Suitable carriers include, for example, magnesium carbonate, magnesium stearate, talc, lactose, sugar, pectin, dextrin, starch, tragacanth, methyl cellulose, sodium carboxymethyl cellulose, a low-melting wax, cocoa butter and the like.
• compositions can include the formulation ofthe active compound with encapsulating material as a carrier providing a capsule in which the active component (with or without other carriers) is surrounded by a carrier, which is thus in association with it.
• cachets are also included.
• Tablets, powders, cachets, and capsules can be used as solid dosage forms suitable for oral administration.
• Liquid pharmaceutical compositions include, for example, solutions suitable for oral or parenteral administration, or suspensions, and emulsions suitable for oral administration.
• Sterile water solutions ofthe active component or sterile solutions ofthe active component in solvents comprising water, ethanol, or propylene glycol are examples of liquid compositions suitable for parenteral administration.
• Sterile solutions can be prepared by dissolving the active component in the desired solvent system, and then passing the resulting solution through a membrane filter to sterilize it or, alternatively, by dissolving the sterile compound in a previously sterilized solvent under sterile conditions.
• Aqueous solutions for oral administration can be prepared by dissolving the active compound in water and adding suitable flavorants, coloring agents, stabilizers, and thickening agents as desired.
• Aqueous suspensions for oral use can be made by dispersing the finely divided active component in water together with a viscous material such as natural or synthetic gums, resins, methyl cellulose, sodium carboxymethyl cellulose, and other suspending agents known to the pharmaceutical formulation art.
• the pharmaceutical composition is in unit dosage form.
• the composition is divided into unit doses containing appropriate quantities ofthe active 4-substituted quinoline.
• the unit dosage form can be a packaged preparation, the package containing discrete quantities ofthe preparation, for example, packeted tablets, capsules, and powders in vials or ampules.
• the unit dosage form can also be a capsule, cachet, or tablet itself, or it can be the appropriate number of any of these packaged forms.
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains approximately 2380 derivatives of 4- aryltetrahydroquinolines (THQs).
• preparation of a library containing the THQs involves the following steps. Briefly, first, 17 diverse aminobenzoic acids, varying at position of Y-R 1 , R 2 , R 3 or R 4 without use of amino- protecting groups, were coupled to MBHA resin employing the tea-bag method of Houghten et. al, as described, for example in U.S. Patent No. 4,631,211 to Houghten and Houghten et al., Proc. Natl. Acad. Sci.. 82:5131-5135 (1985), both of which are incorporated herein by reference.
• each containing one resin-bound aminobenzoic acid were opened and the resin beads combined and thoroughly mixed in a large tea-bag as a suspension in dichloromethane (DCM).
• DCM dichloromethane
• the resin mixture was dried under vacuum, then divided into equivalent portions and resealed in 70 labeled tea-bags, each tea-bag now containing a mixture ofthe 17 aminobenzoic acids. This was followed by reaction with 70 aldehydes, each differing by their R 5 substituent, and 4-methoxystyrene in the presence of trifluoroacetic acid.
• each a mixture containing 34 individual compounds, including enantiomers can then be tested for biological activity using any one of a variety of screening assays, such as those described above or others well known in the art.
• the individual aminobenzoic acids which were used to prepare the library of 2380 THQs include the following: anthranilic acid, 2-amino-4- chlorobenzoic acid, 2-amino-4-fluorobenzoic acid, 2-amino-5-bromobenzoic acid, 2- amino-5-chlorobenzoic acid, 2-amino-5-fluorobenzoic acid, 2-amino-5-iodobenzoic acid, 2-amino-5-methylbenzoic acid, 4,5-difluoroanthranilic acid, 3-amino-2- naphthoic acid, 4-aminobenzoic acid, 4-amino-2-chlorobenzoic acid, 4-amino-2- hydroxybenzoic acid, 4-amino-3-hydroxybenzoic acid, 4-amino-3-methoxybenzoic acid, 4-amino-3 -methylbenzoic acid, and 4-aminohuppuric acid.
• aldehydes employed were as follows: l-methyl-2- pyrrolecarboxaldehyde, 1-napthaldehyde, 2,2-dimethyl-4-pentenal, 2,3,4- trifluorobenzaldehyde, 2,3,5-trichlorobenzaldehyde, 2,3-difluorobenzaldehyde, 2,3- dimethylvaleraldehyde, 2,4-dichlorobenzaldehyde, 2,5-difluorobenzaldehyde, 2,5- dimethylbenzaldehyde, 2,6-difluorobenzaldehyde, 2-bromobenzaldehyde, 2-chloro-5- nitrobenzaldehyde, 2-chloro-6-fluorobenzaldehyde, 2-cyanobenzaldehyde, 2- ethylbutyraldehyde, 2-fluorobenzaldehyde, 2-formylphenoxyacetic acid, 2-methoxy-
• each resin packet was individually coupled overnight ( ⁇ 16 hrs) by adding 5X aminobenzoic acid (0.5 M)in 1:1 DMF/DCM solvent system followed by 5X diisopropylcarbodiimide (DIC) in DCM (0.5 M) and hydroxybenzotriazole (HOBt) (5X). Following coupling completion, resin packets were washed with DCM (2X), DMF (2X), and DCM (IX) and MeOH (IX). After drying under vacuum 4-12 hrs, each individual packet was then opened and a proportional amount of resin transferred to a large Tea-bag ( ⁇ 5" square) which was sealed and shaken in DCM for 1 hour. After a MeOH wash the mixed resin was dried under vacuum and then 30 mg portions (calc. 25 micromole) distributed into labeled Tea-bags ( ⁇ 1.5 " square) for use in subsequent chemistry.
• 5X aminobenzoic acid 0.5 M
• DIC diisopropylcarbodiimide
• HOBt hydroxybenzotriazole
• Tea-bags containing mixtures of 17 aminobenzamide-resins (30 mg, calc. 25 mmole) were added to each solution of 70 aldehydes (1 M) in DMF (10 mL) and cooled in the freezer (-10 °C) for 15-30 minutes. After cooling, 2.42 mL of 4- methoxystyrene (2M final concentration) was added and the solution cooled in the freezer again for 15-30 minutes. Then 0.77 mL of trifluoroacetic acid (IM) was added and the cyclization reaction shaken for 45-50 hours at room temperature. Following completion ofthe 4-(4-Methoxyphenyl)tetrahydroquinoline formation, the resin packets were washed with DCM (2X), DMF (2X), and DCM (IX), MeOH (IX) and dried under vacuum.
• IM trifluoroacetic acid
• This Example provides another representative solid-phase combinatorial synthesis of a library which contains approximately 2380 derivatives of 4-aryltetrahydroquinolines (THQs).
• This Example provides another representative solid-phase combinatorial synthesis of a library which contains approximately 2380 derivatives of
• THQs 4-aryltetrahydroquinolines
• This Example provides another representative solid-phase combinatorial synthesis of a library which contains approximately 2380 derivatives of
• This Example provides another representative solid-phase combinatorial synthesis of a library which contains approximately 2380 derivatives of 4-amidotetrahydroquinolines (THQs).
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains 39,440 derivatives of Branched 4- aryltetrahydroquinolines (THQs).
• preparation of a library containing the THQs involves the following steps. Briefly, first, L and D N-BOC p- nitrophenylalanine were attached to MBHA resin using tea-bags. After removal ofthe BOC protecting group the nitrogen is acylated with 170 acid derivatives creating variation ofthe R 8 substituent, again employing the tea-bags to carry out the operations. The acylated products were mixed by appropriate resin mixing techniques and the nitro group converted to an amino functionality by reduction.
• the 2 subgroups (L or D Branch) were distributed into tea-bags and reacted with 58 aldehydes and 4-methoxystyrene in the presence of trifluoroacetic acid to generate new 4-(4-methoxyphenyl)tetrahydroquinoline derivatives.
• THQs include the following: acetic acid, ⁇ , ⁇ , ⁇ -trifluoro-m-toluic acid, ⁇ , ⁇ , ⁇ - trifluoro-o-toluic acid, ⁇ , ⁇ , ⁇ -trifluoro-p-toluic acid, -cyclohexylphenylacetic acid, - methylcinnamic acid, benzoic acid, butyric acid, chromone-2-carboxylic acid, crotonic acid, cyclobutanecarboxylic acid, cycloheptanecarboxylic acid, cyclohexanebutyric acid, cyclohexanecarboxylic acid, cyclohexanepropionic acid, cyclohexylacetic acid, cyclopentanecarboxylic acid, cyclopentylacetic acid, ethoxyacetic acid, formic acid, heptanoic acid, hydrocinnamic acid, isobutyric acid, isonic
• MBHA resin were prepared, washed with DCM (2X, ⁇ 25 ml each), neutralized with 5% diisopropylethylamine/dichloromethane (DIEA/DCM) (3X, ⁇ 25 ml each), and washed with DCM (2X, ⁇ 25 ml each).
• DIEA/DCM diisopropylethylamine/dichloromethane
• Each resin packet set is individually coupled 2-4 hrs by adding 2.5X L or D N-BOC p-nitrobenzoic acid (0.5 M)in 1 :1 DMF/DCM solvent system followed by 2.5X diisopropylcarbodiimide (DIC) in DCM (0.5 M) and
• Tea-bags (separately 170 bags ofthe L and the D series branched N-acylated p-aminophenylalanine and 1 sibling bag containing L-N-propanoyl p-aminophenylalanine) were added to each solution of 25 aldehydes (1 M) in DMF (10 mL) and cooled in freezer (-10 °C) for 15- 30 minutes. Following, 2.42 mL of 4-methoxystyrene (2M final concentration) was added and the solution cooled in the freezer again for 15-30 minutes. After cooling, 0.77 mL of trifluoroacetic acid (1 M) was added and the cyclization reaction shaken for 45-50 hours at room temperature. Following completion ofthe 4-(4- methoxyphenyl)tetrahydroquinoline formation, the resin packets were washed with DCM (2X), DMF (2X), and DCM (IX), MeOH (IX) and dried under vacuum.
• the branched 4-(4-methoxyphenyl)tetrahydroquinoline controls (L-N- propanoyl p-aminophenylalanine sibling bags) and mixtures were cleaved off the resin by treatment with HF (liquid (1)) at -15 °C for 2 hrs in the presence of anisole scavenger followed by warming to room temperature while removing HF (gaseous (g)) with a nitrogen stream. Results for the control bags are given in Table 3.
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains 35 ,360 derivatives of branched 4- aryltetrahydroquinolines (THQs).
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains approximately 27,200 derivatives of branched 4- aryltetrahydroquinolines (THQs).
• THQs branched 4- aryltetrahydroquinolines
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains approximately 27,200 derivatives of branched 4- amidotetrahydroquinolines (THQs),
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains approximately 27,200 derivatives of branched 4- amidotetrahydroquinolines (THQs),
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains 14,280 derivatives of branched 4-arylquinolines .1. Oxidation ofthe Mixtures of Resin-Bound L and D 6-BranchedfN- Acylated ⁇ 4-f4- MethoxyphenyDTetrahvdroquinolines to L and D 6-BranchedfN-Acylated') 4-(4- MethoxyphenyDQuinolines.
• Tea-bags (mixtures for both L and D series of 170 6- branched(N-acylated) 4-(4-methoxyphenyl)tetrahydroquinolines) are treated with 2.5 mL of 32%> peracetic acid in 50 mL of acetic acid at room temperature for 4-6 hours.
• the resin bags are washed 3X MeOH, IX DCM, IX DMF, 2X DCM and IX MeOH then dried under vacuum for 8-16 hours.
• the 4-(4-Methoxyphenyl)quinolines products are cleaved from the resin with HF using standard procedures as described in Example 1 above.
• This Example provides a representative solid-phase combinatorial synthesis of a library which contains 15,300 derivatives of branched 4-arylquinolines 1.
• THQ mixtures are prepared.
• the 140 30 mg Tea-bags (mixtures for both L and D series of 170 6-branched(N-acylated) 4-(3,4-dimethoxyphenyl)tetrahydroquinolines) are treated with 2.5 mL of 32%> peracetic acid in 50 mL of acetic acid at room temperature for 4-6 hours.
• the resin bags are washed 3X MeOH, IX DCM, IX DMF, 2X DCM and IX MeOH and then dried undervacuum for 8-16 hours.
• the branched 4-(3,4- dimethoxyphenyl)quinoline products are cleaved from the resin with HF using standard procedures as described in Example 1 above.

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  • 1997-12-05 WO PCT/US1997/022391 patent/WO1998034115A1/en not_active Application Discontinuation
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  • 1997-12-05 EP EP97949775A patent/EP0977989A1/de not_active Withdrawn
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