Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
  • C07F15/06—Cobalt compounds
  • C07F15/065—Cobalt compounds without a metal-carbon linkage
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
  • B01J31/22—Organic complexes
  • B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
  • B01J31/2208—Oxygen, e.g. acetylacetonates
  • B01J31/2217—At least one oxygen and one nitrogen atom present as complexing atoms in an at least bidentate or bridging ligand
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/72—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from metals not provided for in group C08F4/44
  • C08F4/80—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from metals not provided for in group C08F4/44 selected from iron group metals or platinum group metals
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
  • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
  • C08G64/02—Aliphatic polycarbonates
  • C08G64/0208—Aliphatic polycarbonates saturated
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
  • C08G64/20—General preparatory processes
  • C08G64/32—General preparatory processes using carbon dioxide
  • C08G64/34—General preparatory processes using carbon dioxide and cyclic ethers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
  • B01J2231/10—Polymerisation reactions involving at least dual use catalysts, e.g. for both oligomerisation and polymerisation
  • B01J2231/14—Other (co) polymerisation, e.g. of lactides or epoxides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
  • B01J2531/80—Complexes comprising metals of Group VIII as the central metal
  • B01J2531/84—Metals of the iron group
  • B01J2531/845—Cobalt

Definitions

• APCs aliphatic polycarbonates
• transition metal coordination complexes e.g. , porphyrin complexes, salen complexes, etc.
• the latter type provides several advantages, including the production of polycarbonates having a high carbonate content, easier catalyst preparation, and decreased induction time prior to polymerization.
• some of these catalysts have a tendency to become bound to the polymer chain during polymerization, which can complicate separation of the catalyst from the polymer product. Therefore, there remains a need for the continued development of novel metal complexes that have improved reaction and/or product purity characteristics.
• the present invention provides, among other things, metallosalenate complexes comprising a cationic bicyclic amidinium group, wherein the cationic bicyclic amidinium group has no free amines.
• metallosalenate complexes are of formula I:
• Certain compounds of the present invention can comprise one or more asymmetric centers, and thus can exist in various stereoisomeric forms, e.g., enantiomers and/or
• inventive compounds and compositions thereof may be in the form of an individual enantiomer, diastereomer or geometric isomer, or may be in the form of a mixture of stereoisomers.
• the compounds of the invention are enantiopure compounds.
• mixtures of enantiomers or diastereomers are provided.
• certain compounds, as described herein may have one or more double bonds that can exist as either the Z or E isomer, unless otherwise indicated.
• the invention additionally encompasses the compounds as individual isomers substantially free of other isomers and alternatively, as mixtures of various isomers, e.g., racemic mixtures of enantiomers.
• this invention also encompasses compositions comprising one or more compounds.
• isomers includes any and all geometric isomers and stereoisomers.
• “isomers” include cis- and trans-isomers, E- and Z- isomers, R- and S-enantiomers, diastereomers, (D)-isomers, (L)-isomers, racemic mixtures thereof, and other mixtures thereof, as falling within the scope of the invention.
• a stereoisomer may, in some embodiments, be provided substantially free of one or more corresponding
• stereoisomers and may also be referred to as "stereochemically enriched.”
• a particular enantiomer may, in some embodiments be provided substantially free of the opposite enantiomer, and may also be referred to as "optically enriched.”
• “Optically enriched,” as used herein, means that the compound or polymer is made up of a significantly greater proportion of one enantiomer. In certain embodiments the compound is made up of at least about 90% by weight of a preferred enantiomer. In other embodiments the compound is made up of at least about 95%, 98%, or 99% by weight of a preferred enantiomer.
• Preferred enantiomers may be isolated from racemic mixtures by any method known to those skilled in the art, including chiral high pressure liquid chromatography (HPLC) and the formation and crystallization of chiral salts or prepared by asymmetric syntheses.
• HPLC high pressure liquid chromatography
• Jacques, et al. Enantiomers, Racemates and Resolutions (Wiley Interscience, New York, 1981); Wilen, S.H., et al, Tetrahedron 33:2725 (1977); Eliel, E.L. Stereochemistry of Carbon Compounds (McGraw-Hill, NY, 1962); Wilen, S.H. Tables of Resolving Agents and Optical Resolutions p. 268 (E.L. Eliel, Ed., Univ. of Notre Dame Press, Notre Dame, IN 1972).
• epoxide refers to a substituted or unsubstituted oxirane.
• substituted oxiranes include monosubstituted oxiranes, disubstituted oxiranes, trisubstituted oxiranes, and tetrasubstituted oxiranes.
• Such epoxides may be further optionally substituted as defined herein.
• epoxides comprise a single oxirane moiety.
• epoxides comprise two or more oxirane moieties.
• polymer refers to a molecule of high relative molecular mass, the structure of which comprises the multiple repetition of units derived, actually or
• a polymer is comprised of substantially alternating units derived from C0 2 and an epoxide ⁇ e.g., poly(ethylene carbonate).
• a polymer of the present invention is a copolymer, terpolymer, heteropolymer, block copolymer, or tapered heteropolymer incorporating two or more different epoxide monomers.
• halo and halogen as used herein refer to an atom selected from fluorine (fluoro, -F), chlorine (chloro, -CI), bromine (bromo, -Br), and iodine (iodo, -I).
• aliphatic or "aliphatic group”, as used herein, denotes a hydrocarbon moiety that may be straight-chain (i.e., unbranched), branched, or cyclic (including fused, bridging, and spiro-fused polycyclic) and may be completely saturated or may contain one or more units of unsaturation, but which is not aromatic. Unless otherwise specified, aliphatic groups contain 1- 40 carbon atoms. In certain embodiments, aliphatic groups contain 1-20 carbon atoms. In certain embodiments, aliphatic groups contain 3-20 carbon atoms. In certain embodiments, aliphatic groups contain 1-12 carbon atoms. In certain embodiments, aliphatic groups contain 1-8 carbon atoms.
• aliphatic groups contain 1-6 carbon atoms. In some embodiments, aliphatic groups contain 1-5 carbon atoms, in some embodiments, aliphatic groups contain 1-4 carbon atoms, in some embodiments aliphatic groups contain 1-3 carbon atoms, and in some embodiments aliphatic groups contain 1 or 2 carbon atoms.
• Suitable aliphatic groups include, but are not limited to, linear or branched, alkyl, alkenyl, and alkynyl groups, and hybrids thereof such as (cycloalkyl)alkyl, (cycloalkenyl)alkyl or (cycloalkyl)alkenyl.
• heteroaliphatic refers to aliphatic groups wherein one or more carbon atoms are independently replaced by one or more atoms selected from the group consisting of oxygen, sulfur, nitrogen, or phosphorus. In certain embodiments, one to six carbon atoms are independently replaced by one or more of oxygen, sulfur, nitrogen, or phosphorus. Heteroaliphatic groups may be substituted or unsubstituted, branched or unbranched, cyclic or acyclic, and include saturated, unsaturated or partially unsaturated groups.
• cycloaliphatic used alone or as part of a larger moiety, refer to a saturated or partially unsaturated cyclic aliphatic monocyclic or polycyclic ring systems, as described herein, having from 3 to 12 members, wherein the aliphatic ring system is optionally substituted as defined above and described herein.
• Cycloaliphatic groups include, without limitation, cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cycloheptyl, cycloheptenyl, cyclooctyl, cyclooctenyl, norbornyl, adamantyl, and cyclooctadienyl.
• the cycloalkyl has 3-6 carbons.
• cycloaliphatic also include aliphatic rings that are fused to one or more aromatic or nonaromatic rings, such as decahydronaphthyl or tetrahydronaphthyl, where the radical or point of attachment is on the aliphatic ring.
• aromatic or nonaromatic rings such as decahydronaphthyl or tetrahydronaphthyl, where the radical or point of attachment is on the aliphatic ring.
• 3- to 7-membered carbocycle refers to a 3- to 7-membered saturated or partially unsaturated monocyclic carbocyclic ring.
• alkyl refers to saturated, straight- or branched-chain hydrocarbon radicals derived from an aliphatic moiety containing between one and six carbon atoms by removal of a single hydrogen atom. Unless otherwise specified, alkyl groups contain 1-12 carbon atoms. In certain embodiments, alkyl groups contain 1-8 carbon atoms. In certain embodiments, alkyl groups contain 1-6 carbon atoms. In some embodiments, alkyl groups contain 1-5 carbon atoms, in some embodiments, alkyl groups contain 1-4 carbon atoms, in some embodiments alkyl groups contain 1-3 carbon atoms, and in some embodiments alkyl groups contain 1-2 carbon atoms.
• alkyl radicals include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, iso-butyl, sec-butyl, sec-pentyl, iso-pentyl, tert- butyl, n-pentyl, neopentyl, n-hexyl, sec-hexyl, n-heptyl, n-octyl, n-decyl, n-undecyl, dodecyl, and the like.
• alkenyl denotes a monovalent group derived from a straight- or branched-chain aliphatic moiety having at least one carbon-carbon double bond by the removal of a single hydrogen atom. Unless otherwise specified, alkenyl groups contain 2-12 carbon atoms. In certain embodiments, alkenyl groups contain 2-8 carbon atoms. In certain embodiments, alkenyl groups contain 2-6 carbon atoms. In some embodiments, alkenyl groups contain 2-5 carbon atoms, in some embodiments, alkenyl groups contain 2-4 carbon atoms, in some embodiments alkenyl groups contain 2-3 carbon atoms, and in some embodiments alkenyl groups contain 2 carbon atoms. Alkenyl groups include, for example, ethenyl, propenyl, butenyl, l-methyl-2-buten-l-yl, and the like.
• alkynyl refers to a monovalent group derived from a straight- or branched-chain aliphatic moiety having at least one carbon-carbon triple bond by the removal of a single hydrogen atom. Unless otherwise specified, alkynyl groups contain 2-12 carbon atoms. In certain embodiments, alkynyl groups contain 2-8 carbon atoms. In certain
• alkynyl groups contain 2-6 carbon atoms. In some embodiments, alkynyl groups contain 2-5 carbon atoms, in some embodiments, alkynyl groups contain 2-4 carbon atoms, in some embodiments alkynyl groups contain 2-3 carbon atoms, and in some embodiments alkynyl groups contain 2 carbon atoms.
• Representative alkynyl groups include, but are not limited to, ethynyl, 2-propynyl (propargyl), 1-propynyl, and the like.
• alkoxy refers to an alkyl group, as previously defined, attached to the parent molecule through an oxygen atom.
• alkoxy include but are not limited to, methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, tert-butoxy, neopentoxy, and n- hexoxy.
• acyloxy refers to an acyl group attached to the parent molecule through an oxygen atom.
• aryl used alone or as part of a larger moiety as in “aralkyl”, “aralkoxy”, or “aryloxyalkyl”, refers to monocyclic and polycyclic ring systems having a total of five to 20 ring members, wherein at least one ring in the system is aromatic and wherein each ring in the system contains three to twelve ring members.
• aryl may be used interchangeably with the term “aryl ring”.
• aryl refers to an aromatic ring system which includes, but is not limited to, phenyl, biphenyl, naphthyl, anthracyl and the like, which may bear one or more substituents.
• aryl is a group in which an aromatic ring is fused to one or more additional rings, such as benzofuranyl, indanyl, phthalimidyl, naphthimidyl, phenantriidinyl, or
• the term "6- to 10-membered aryl” refers to a phenyl or an 8- to 10-membered polycyclic aryl ring.
• heteroaryl and “heteroar-”, used alone or as part of a larger moiety refer to groups having 5 to 14 ring atoms, preferably 5, 6, or 9 ring atoms; having 6, 10, or 14 ⁇ electrons shared in a cyclic array; and having, in addition to carbon atoms, from one to five heteroatoms.
• heteroatom refers to nitrogen, oxygen, or sulfur, and includes any oxidized form of nitrogen or sulfur, and any quaternized form of a basic nitrogen.
• Heteroaryl groups include, without limitation, thienyl, furanyl, pyrrolyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, indolizinyl, purinyl, naphthyridinyl, benzofuranyl and pteridinyl.
• heteroaryl and “heteroar-”, as used herein, also include groups in which a heteroaromatic ring is fused to one or more aryl, cycloaliphatic, or heterocyclyl rings, where the radical or point of attachment is on the heteroaromatic ring.
• Nonlimiting examples include indolyl, isoindolyl, benzothienyl,
• a heteroaryl group may be mono- or bicyclic.
• heteroaryl may be used interchangeably with the terms “heteroaryl ring”, “heteroaryl group”, or “heteroaromatic”, any of which terms include rings that are optionally substituted.
• heteroarylkyl refers to an alkyl group substituted by a heteroaryl, wherein the alkyl and heteroaryl portions independently are optionally substituted.
• the term “5- to 12-membered heteroaryl” refers to a 5- to 6-membered heteroaryl ring having 1 to 3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or an 8- to 12-membered bicyclic heteroaryl ring having 1 to 4 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
• heterocycle As used herein, the terms “heterocycle”, “heterocyclyl”, “heterocyclic radical”, and “heterocyclic ring” are used interchangeably and refer to a stable 5- to 7-membered monocyclic or 7-14-membered poly cyclic heterocyclic moiety that is either saturated or partially
• the term "nitrogen” includes a substituted nitrogen.
• the nitrogen in a saturated or partially unsaturated ring having 0-3 heteroatoms selected from oxygen, sulfur or nitrogen, the nitrogen may be N (as in 3,4-dihydro-2H-pyrrolyl), ⁇ (as in pyrrolidinyl), or (as in N-substituted pyrrolidinyl).
• the term "3- to 7-membered heterocyclic” refers to a 3- to 7-membered saturated or partially unsaturated monocyclic heterocyclic ring having 1 to 2 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
• a heterocyclic ring can be attached to its pendant group at any heteroatom or carbon atom that results in a stable structure and any of the ring atoms can be optionally substituted.
• saturated or partially unsaturated heterocyclic radicals include, without limitation, tetrahydrofuranyl, tetrahydrothienyl, pyrrolidinyl, pyrrolidonyl, piperidinyl, pyrrolinyl, tetrahydroquinolinyl, tetrahydroisoquinolinyl, decahydroquinolinyl, oxazolidinyl, piperazinyl, dioxanyl, dioxolanyl, diazepinyl, oxazepinyl, thiazepinyl, morpholinyl, and quinuclidinyl.
• heterocycle used interchangeably herein, and also include groups in which a heterocyclyl ring is fused to one or more aryl, heteroaryl, or cycloaliphatic rings, such as indolinyl, 3H-indolyl, chromanyl, phenanthridinyl, or
• heterocyclyl group may be mono- or bicyclic.
• heterocyclylalkyl refers to an alkyl group substituted by a heterocyclyl, wherein the alkyl and heterocyclyl portions independently are optionally substituted.
• partially unsaturated refers to a ring moiety that includes at least one double or triple bond.
• partially unsaturated is intended to encompass rings having multiple sites of unsaturation, but is not intended to include aryl or heteroaryl moieties, as herein defined.
• compounds of the invention may contain "optionally substituted” moieties.
• substituted whether preceded by the term “optionally” or not, means that one or more hydrogens of the designated moiety are replaced with a suitable substituent.
• an "optionally substituted” group may have a suitable substituent at each substitutable position of the group, and when more than one position in any given structure may be substituted with more than one substituent selected from a specified group, the substituent may be either the same or different at every position.
• Combinations of substituents envisioned by this invention are preferably those that result in the formation of stable or chemically feasible compounds.
• stable refers to compounds that are not substantially altered when subjected to conditions to allow for their production, detection, and, in certain embodiments, their recovery, purification, and use for one or more of the purposes disclosed herein.
• Suitable monovalent substituents on a substitutable carbon atom of an "optionally substituted" group are independently halogen; -(CH 2 )o-4R°; -(CH 2 ) 0 ⁇ OR°; -O-(CH 2 ) 0 _
• Suitable monovalent substituents on R° are independently halogen, -(CH 2 ) 0 2 R*, -(haloR*), -(CH 2 )o 2 OH, -(CH 2 ) 0 2 OR*, -(CH 2 ) 0 2 CH(OR*) 2 ; -O(haloR'), -CN, -N 3 , - (CH 2 )o 2 C(0)R*, -(CH 2 )o 2 C(0)OH, -(CH 2 ) 0 2 C(0)OR*, -(CH 2 ) 0 ⁇ C(O)N(R°) 2 ; -(CH 2 ) 0 2 SR*, -(CH 2 )o 2 SH, -(CH 2 )o 2 NH 2 , -(CH 2 ) 0 2 NHR*, -(CH 2 ) 0
• Suitable divalent substituents that are bound to vicinal substitutable carbons of an "optionally substituted" group include: -0(CR 2 ) 2 3 0-, wherein each independent occurrence of R is selected from hydrogen, Ci_6 aliphatic which may be substituted as defined below, or an unsubstituted 5-6-membered saturated, partially unsaturated, or aryl ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
• Suitable substituents on the aliphatic group of R * include halogen, -R*, -(haloR*), -OH, -OR*, -O(haloR'), -CN, -C(0)OH, -C(0)OR*, -NH 2 , -NHR*, -NR* 2 , or -N0 2 , wherein each R* is unsubstituted or where preceded by "halo" is substituted only with one or more halogens, and is independently Ci_ 4 aliphatic, -CH 2 Ph, -O(CH 2 ) 0 iPh, or a 5-6-membered saturated, partially unsaturated, or aryl ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
• Suitable substituents on a substitutable nitrogen of an "optionally substituted" group include -R ⁇ , -NR ⁇ 2 , -C(0)R ⁇ , -C(0)OR ⁇ , -C(0)C(0)R ⁇ , -C(0)CH 2 C(0)R ⁇ , -S(0) 2 R ⁇ , - S(0) 2 NR ⁇ 2 , -C(S)NR ⁇ 2 , -C(NH)NR ⁇ 2 , or -N(R ⁇ )S(0) 2 R ⁇ ; wherein each R ⁇ is independently hydrogen, Ci_ 6 aliphatic which may be substituted as defined below, unsubstituted -OPh, or an unsubstituted 5-6-membered saturated, partially unsaturated, or aryl ring having 0-4
• heteroatoms independently selected from nitrogen, oxygen, or sulfur, or, notwithstanding the definition above, two independent occurrences of R ⁇ , taken together with their intervening atom(s) form an unsubstituted 3-12-membered saturated, partially unsaturated, or aryl mono- or bicyclic ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
• a substitutable nitrogen may be substituted with three R ⁇ substituents to provide a charged ammonium moiety -N + (R ⁇ ) 3 , wherein the ammonium moiety is further complexed with a suitable counterion.
• Suitable substituents on the aliphatic group of R ⁇ are independently halogen, -R*, - (haloR*), -OH, -OR*, -O(haloR'), -CN, -C(0)OH, -C(0)OR*, -NH 2 , -NHR*, -NR* 2 , or -
• each R* is unsubstituted or where preceded by "halo" is substituted only with one or more halogens, and is independently C ⁇ aliphatic, -CH 2 Ph, -O(CH 2 ) 0 -iPh, or a 5-6- membered saturated, partially unsaturated, or aryl ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
• radical or “optionally substituted radical” is sometimes used.
• radical means a moiety or functional group having an available position for attachment to the structure on which the substituent is bound. In general the point of attachment would bear a hydrogen atom if the substituent were an independent neutral molecule rather than a substituent.
• radical or “optionally- substituted radical” in this context are thus interchangeable with “group” or “optionally- substituted group”.
• a substance and/or entity is "pure” if it is substantially free of other components.
• Such relative assessments of components can be determined by molar ratio, dry weight, volume, various analytical techniques (e.g. , photometry, spectrometry,
• a preparation that contains more than about 75% of a particular substance and/or entity is considered to be a pure preparation.
• a substance and/or entity is at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% pure.
• isolated refers to a substance or entity that has been separated from at least some of the components with which it was associated when initially produced (whether in nature or in an experimental setting). Isolated substances and/or entities may be separated from at least about 10%>, about 20%>, about 30%>, about 40%>, about 50%>, about 60%>, about 70%), about 80%>, about 90%>, about 95%, about 99% or more of the other components with which they were initially associated. In some embodiments, isolated agents are more than about 80%, about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99%, or more than about 99% pure.
• catalyst refers to a substance the presence of which increases the rate and/or extent of a chemical reaction, while not being consumed or undergoing a permanent chemical change itself.
• the present invention encompasses the recognition that there remains a need for metal complexes that have improved reaction and/or product purity characteristics.
• the present invention provides, among other things, new metal complexes that do not form permanent covalent bonds with the polymer product.
• the present invention provides metal complexes that, compared to certain known metal complexes, are more easily separated from the polymerization product.
• transition metal complexes having a salen-type ligand and a tethered bicyclic guanidine group have been shown to be superior catalysts for the copolymerization of epoxides and carbon dioxide (WO2010/022388). It has been observed by Applicant and others that such complexes, or portions thereof, have a tendency to form covalent bonds with the polymer chain during polymerization, complicating purification of the polymer product.
• Applicant proposes the possibility that when a bicyclic guanidine moiety, including but not limited to l,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), is tethered to the metal complex, the remaining secondary amine group of the bicyclic guanidine group can form a covalent bond with the polymer chain.
• TBD l,5,7-triazabicyclo[4.4.0]dec-5-ene
• catalyst fragments may be bound to the polymer chain.
• bound fragments may impart undesirable characteristics to the polymer composition, including but not limited to a yellow color.
• bound fragments are portions of the metal complex ligands.
• One possible depiction of such a bound ligand fragment is:
• Applicant describes herein that replacement of the guanidine group with an amidine group, thereby removing the secondary amine group, prevents the undesirable covalent binding of the metal complex (or fragmented ligand thereof) to the polymer.
• the present invention provides, among other things, methods for polymerizing an epoxide and carbon dioxide with a provided metal complex to form a polycarbonate polymer composition, wherein the polycarbonate polymer composition is substantially free of covalently- bound metal complex or any amidine-containing portion thereof.
• chromatography is used to obtain an isolated polycarbonate polymer composition.
• the isolated polycarbonate polymer composition is substantially free of the metal complex or any amidine-containing portion thereof.
• the present invention provides, among other things, methods for obtaining substantially isolated, intact metal complexes of the present invention following polymerization of an epoxide and carbon dioxide with a provided metal complex.
• the present invention provides a metallosalenate complex comprising a cationic bicyclic amidinium group, wherein the cationic bicyclic amidinium group has no free amines.
• the term "no free amines", as used herein, refers to an amidinium group having no nitrogen atoms bearing a hydrogen in any tautomeric or resonance form.
• an amidinium group having no free amines has one nitrogen atom bearing three nonhydrogen substituents and a second nitrogen atom with bonds to four nonhydrogen substituents.
• such nonhydrogen substituents are aliphatic substituents.
• such nonhydrogen substituents comprise the rings of the bicyclic amidinium group.
• an amidinium group having no free amines is cationic, as compared to a neutral amidinium group having a free amine.
• the present invention provides a metallosalenate complex of formula I:
• R la and R la' are independently a hydrogen or an optionally substituted radical selected from the group consisting of C 1-12 aliphatic; C 1-12 heteroaliphatic; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated heterocyclic ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur;
• each R d is independently a -L-CA group, halogen, -OR, -NR 2 , -SR, -CN, -N0 2 , -S0 2 R, -SOR, -SO2NR2, -CNO, -CO2R, -CON(R) 2 , -OC(0)NR 2 , -OC(0)OR, -NRS0 2 R, -NCO, -N 3 , -SiR 3 ; or an optionally substituted radical selected from the group consisting of Ci_ 20 aliphatic; Ci_ 2 o heteroaliphatic; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 7- to 14-membered saturated, partially unsaturated or aromatic polycyclic carbocycle; a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated
• each L is independently a covalent bond or an optionally substituted, saturated or unsaturated, straight or branched, bivalent C 1-12 hydrocarbon chain, wherein one or more methylene units of L are optionally and independently replaced by -Cy-, -CR 2 -, -NR-, -N(R)C(0)-, - C(0)N(R)-, -N(R)S0 2 -, -S0 2 N(R)-, -0-, -C(O)-, -OC(O)-, -OC(0)0-, -C(0)0-, - N(R)C(0)0-, -SiR 2 -, -S-, -SO-, or -S0 2 -; each CA is independently a cationic bicyclic amidinium group having no free amines; each Cy is independently an optionally substituted bivalent ring selected from phenylene, a 3-7 membered saturated or partially unsaturated carbocyclylene, a 3-7 membere
• R 4b is selected from the group consisting of:
• R c at each occurrence is independently hydrogen, halogen, -OR, -NR 2 , -SR, -CN, -N0 2 , -S0 2 R, -SOR, -SO2NR2, -CNO, -CO2R, -CON(R) 2 , -OC(0)NR 2 , -OC(0)OR, -NRS0 2 R, -NCO, -N 3 , -SiR 3 ; or an optionally substituted radical selected from the group consisting of Ci_ 2 o aliphatic; Ci_ 2 o heteroaliphatic; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 7- to 14-membered saturated, partially unsaturated or aromatic polycyclic carbocycle; a 5- to 6-membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated heterocycl
• R at each occurrence is independently hydrogen, an optionally substituted radical selected the group consisting of acyl; Ci_ 2 o aliphatic; Ci_ 2 o heteroaliphatic; carbamoyl; arylalkyl; phenyl; a 3- to 8-membered saturated or partially unsaturated monocyclic carbocycle, a 7- to 14- membered saturated, partially unsaturated or aromatic polycyclic carbocycle; a 5- to 6- membered monocyclic heteroaryl ring having 1-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur; a 3- to 8-membered saturated or partially unsaturated
• M is a metal atom
• each X is independently a suitable counterion
• k is from 0 to 2, inclusive
• n is from 0 to 6, inclusive
• m ' is from 0 to 4, inclusive
• q is from 0 to 4, inclusive
• x is from 0 to 2, inclusive.
• the present invention provides a metallosalenate complex of formula II:
• the present invention provides a metallosalenate complex of formula Il-a:
• each of k, m, q, L, CA, R c , R d , M, and X are as defined above and described in classes and subclasses herein, both singly and in combination.
• the present invention provides a metallosalenate complex of formula Il-aa, Il-bb, II-cc, Il-dd, Il-ee, Il-ff, Il-gg, or Il-hh:
• the present invention provides a metallosalenate complex of formula Il-ii, Il-jj, Il-kk, 11-11, or Il-mm:
• the present invention provides a metallosalenate complex of formula III:
• Y when present, is a suitable counterion; wherein when k is 2, Y is absent and X comprises two monodentate moieties or a single bidentate moiety, or X and Y are taken together to comprise a suitable dianion.
• the present invention provides a metallosalenate complex of formula Ill-a:
• complexes of formula Ill-a are racemic. In certain embodiments, complexes of formula Ill-a are non-racemic (i.e., the complex is enantioenriched or enantiopure).
• the present invention provides a metallosalenate complex of formula IV:
• the present invention provides a metallosalenate complex of formula IV-a:
• complexes of formula IV-a are racemic. In certain embodiments, complexes of formula IV-a are non-racemic (i.e., the complex is enantioenriched or enantiopure).
• a metal atom, M is selected from periodic table groups 3-13, inclusive.
• M is a transition metal selected from periodic table groups 5- 12, inclusive.
• M is a transition metal selected from periodic table groups 4-11, inclusive.
• M is a transition metal selected from periodic table groups 5-10, inclusive.
• M is a transition metal selected from periodic table groups 7-9, inclusive.
• M is selected from the group consisting of Cr, Mn, V, Fe, Co, Mo, W, Ru, Al, and Ni.
• M is a metal atom selected from the group consisting of: cobalt; chromium; aluminum; titanium; ruthenium, and manganese.
• M is cobalt.
• M is chromium.
• M is aluminum.
• the cobalt metal has an oxidation state of +3 ⁇ i.e., Co(III)).
• the cobalt metal has an oxidation state of +2 ⁇ i.e., Co(II)).
• R la and R la are hydrogen.
• one occurrence of R ⁇ is a -L-CA group, and any other R d groups are optionally substituted Ci_ 2 o aliphatic groups or an optionally substituted phenyl group.
• two occurrences of R ⁇ are a -L-CA group, and any other R d groups are optionally substituted Ci_ 2 o aliphatic groups or an optionally substituted phenyl group.
• the two -L-CA groups are appended to the same salicylaldehyde aryl ring.
• the two -L-CA groups are to different salicylaldehyde aryl rings.
• the two -L-CA groups are appended to different salicylaldehyde aryl rings such that the resulting complex is C2-symmetric.
• each -L-CA group is the same. In some embodiments, where a metal complex has multiple -L-CA groups, at least one -L-CA group is different from other -L-CA groups.
• -L- is an optionally substituted, saturated or unsaturated, straight or branched, bivalent C 1-12 hydrocarbon chain, wherein one, two, or three methylene units of L are optionally and independently replaced by -Cy-, -CR 2 -, -NR-, -N(R)C(0)-, -C(0)N(R)-, -N(R)S0 2 -, -S0 2 N(R)-, -0-, -C(O)-, -OC(O)-, -OC(0)0-, -C(0)0-, -N(R)C(0)0-, -SiR 2 -, -S-, - SO-, or -S0 2 -.
• -L- is an optionally substituted, saturated or unsaturated, straight or branched, bivalent Ci_ 6 hydrocarbon chain, wherein one, two, or three methylene units of L are optionally and independently replaced by -Cy-, -CR 2 -, -NR-, -N(R)C(0)-, -C(0)N(R)-, -N(R)S0 2 -, -S0 2 N(R)-, -0-, -C(O)-, -OC(O)-, -OC(0)0-, -C(0)0-, -N(R)C(0)0-, -SiR 2 -, -S-, - SO-, or -S0 2 -.
• -L- is an optionally substituted, saturated or unsaturated, straight or branched, bivalent Ci_ 6 hydrocarbon chain, wherein one or two methylene units of L are optionally and independently replaced by -NR-, -0-, or -C(O)-.
• -L- is a straight or branched, saturated or unsaturated, bivalent Ci_ i 2 hydrocarbon chain. In some embodiments, -L- is a straight or branched, saturated or unsaturated, bivalent Ci_ 6 hydrocarbon chain. In some embodiments, -L- is -(CH 2 ) 6 -. In some embodiments, -L- is -(CH 2 ) 5 -. In some embodiments, -L- is -(CH 2 ) 4 -. In some embodiments, - L- is -(CH 2 ) 3 -. In some embodiments, -L- is -(CH 2 ) 2 -. In some embodiments, -L- is -(CH 2 )-. In some embodiments, -L- is -(CH 2 )-.
• -L- is selected from the group consisting of:
• R y is -H, or an optionally substituted radical selected from the group consisting of Ci- 6 aliphatic, 3- to 7-membered heterocyclic, phenyl, and membered aryl. In certain embodiments, R y is other than -H.
• -L- is selected from the group consisting of:
• -CA is selected from the group consisting of
• the ligand portion of provided metallosalenate complexes contains a substructure selected from the group consisting of:
• k is 0. In some embodiments, k is 1. In some embodiments, k is 2.
• X and Y are independently a suitable counterion.
• Suitable counterions for such metal complexes are known in the art and refer to an anion or cation suitable to balance the charge.
• a suitable counterion is an anion.
• a suitable anion is selected from the group consisting of halide, a complex inorganic ion (e.g., perchlorate), borates, sulfonates, sulfates, phosphates, phenolates, carbonates, and carboxylates.
• a metallosalenate complex initially comprises both a X and Y counterion, but the Y counterion is later displaced by a bidentate X counterion or a second monodentate X ligand, thereby maintaining the proper charge balance on the metallosalenate complex.
• k is 2 and X comprises two monodentate moieties. In some embodiments, k is 2 and X comprises a single bidentate moiety. In some embodiments, k is 2, Y is absent and X comprises a single bidentate moiety. In some embodiments, Y is absent. In some embodiments, X is carbonate.
• X and Y are taken together and comprise a dianion. In some embodiments, X and Y together form a diacid. In some embodiments, X and Y together form a dicarboxylic acid.
• Y is selected from the group consisting of halide, hydroxide, carboxylate, sulfate, phosphate, nitrate, alkyl sulfonate, and aryl sulfonate.
• X and Y are independently hydrogen phosphate, sulfate, a halide or carbonate. In some embodiments, X is carbonate. In some embodiments, Y is chloro, bromo, or iodo. In some embodiments, Y is chloro.
• M is cobalt
• -L- is a bivalent Ci_ 6 hydrocarbon chain
• -CA is selected from the group consisting of:
• M is a metal atom; k is from 0-2; and
• X and Y are each independently a suitable counterion, wherein when k is 1 , X comprises a
• a formal negative charge may be placed on the cobalt atom.
• a provided metallosalenate complex having the structure:
• the present invention provides a method comprising the step of contacting an epoxide or mixture of epoxides and carbon dioxide with a provided metallosalenate complex to form a polycarbonate polymer composition, wherein the polycarbonate polymer composition is substantially free of covalently-bound metallosalenate complex or any portion thereof.
• the present invention provides a method comprising the steps of: i. contacting an epoxide and carbon dioxide with a metallosalenate complex to form a polycarbonate polymer composition; and
• an isolated polycarbonate polymer composition is pure. In some embodiments, an isolated polycarbonate polymer composition is 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% pure. In some embodiments, an isolated polycarbonate polymer composition is substantially free of the metallosalenate complex or any portion thereof.
• the present invention provides a method comprising the steps of: i. contacting an epoxide and carbon dioxide with a metallosalenate complex to form a polycarbonate polymer composition; and
• a 10 wt% ethanolic solution of aldehyde 6 (6 is made according to Example 9 of WO 2012/040454, substituting 7-methyl-l,5,7-triazabicyclo[4.4.0]dec-5-ene with 1,8- diazabicyclo[5.4.0]undec-7-ene (DBU)), is contacted with an equimolar amount of the known ammonium salt 7 (described in Chemical Communications (2010), 46(17), 2935-2937) in the presence of NaOH to provide ligand 8.
• the ligand is treated with cobalt(II) acetate to afford the cobalt(II) complex and liberate two equivalents of acetic acid. This complex is oxidized in the presence of air to provide the desired catalyst.
• Example 2
• This example describes the synthesis of additional catalysts of the present invention having alternate substitution patterns on the aryl rings of the salcy ligands.
• Compounds 2a through 2n are synthesized according to conditions of Example 1, except ammonium salts with alternate substitution patterns on the aryl ring are employed in place of the 2,4-di-t-butyl analog 7 used in Example 1.
• Compounds 2o through 2q are synthesized according to conditions of Example 1, except that l,8-diazabicyclo[5.4.0]undec-7-ene is substituted with 1,5- diazabicyclo[4.3.0]non-5-ene.
• the required ammonium salts are obtained by condensing racemic trans 1 ,2 cyclohexanediamine monohydrochloride with salicaldehyde analogs having the desired substituents at the 2- and/or 4-positions.
• the catalyst is isolated as its carbonate salt, (i.e. X and Y are taken together to be CO3 2" ).
• Catalysts 3a and 3d through 3f are produced according to the method of Example 1, except the required ligand is made by sequential addition of the appropriate salicylaldehyde and aldehyde 6 to isobutylene diamine in the presence of 3-angstrom molecular sieves.
• Catalysts 4b and 4c are produced according to the method of Example 1, by condensing aldehyde 6 with appropriate hydrochloride salts analogous to the 1 ,2 cyclohexane diamine- derived salt 7 used in Example 1.
• the required hydrochloride salts are produced in a separate step by sequential addition of one equivalent of HCl, and one equivalent of 2,4-di-tert butyl salicylaldehyde to ethylene diamine (3b) or 1,3 diaminopropane (3c).

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