WO2022153626A1 - 複素環含有アミノ酸化合物の製造方法 - Google Patents
複素環含有アミノ酸化合物の製造方法 Download PDFInfo
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- WO2022153626A1 WO2022153626A1 PCT/JP2021/037366 JP2021037366W WO2022153626A1 WO 2022153626 A1 WO2022153626 A1 WO 2022153626A1 JP 2021037366 W JP2021037366 W JP 2021037366W WO 2022153626 A1 WO2022153626 A1 WO 2022153626A1
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
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- 125000004674 methylcarbonyl group Chemical group CC(=O)* 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- GJRGEVKCJPPZIT-JBDRJPRFSA-N mugineic acid Chemical compound OC(=O)[C@@H](O)CCN[C@H](C(O)=O)[C@@H](O)CN1CC[C@H]1C(O)=O GJRGEVKCJPPZIT-JBDRJPRFSA-N 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004676 n-butylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C(*)=O 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000006252 n-propylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C(*)=O 0.000 description 1
- 125000001038 naphthoyl group Chemical group C1(=CC=CC2=CC=CC=C12)C(=O)* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000005146 naphthylsulfonyl group Chemical group C1(=CC=CC2=CC=CC=C12)S(=O)(=O)* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000006503 p-nitrobenzyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1[N+]([O-])=O)C([H])([H])* 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000003170 phenylsulfonyl group Chemical group C1(=CC=CC=C1)S(=O)(=O)* 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000004673 propylcarbonyl group Chemical group 0.000 description 1
- 125000004742 propyloxycarbonyl group Chemical group 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 230000003248 secreting effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 125000006253 t-butylcarbonyl group Chemical group [H]C([H])([H])C(C(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- ZMANZCXQSJIPKH-UHFFFAOYSA-O triethylammonium ion Chemical compound CC[NH+](CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-O 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/04—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D207/10—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/16—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Definitions
- the present invention relates to a method for producing a heterocyclic amino acid compound and the like.
- iron is an element necessary for respiration, photosynthesis, DNA synthesis, etc., and is an active central metal of an enzyme essential for chlorophyll biosynthesis. Therefore, iron deficiency causes chlorosis (iron deficiency yellowing) in which the leaves turn yellow.
- Gramineous plants such as barley, rice, wheat, and corn include mugineic acid represented by the following formula (A) and mugineic acids (chelating agent) such as 2'-deoxymugineic acid (DMA) represented by the following formula (B).
- mugineic acid represented by the following formula (A)
- chelating agent such as 2'-deoxymugineic acid (DMA) represented by the following formula (B).
- DMA 2'-deoxymugineic acid
- the present inventors have proposed a heterocyclic amino acid compound useful as a chelating agent having an iron uptake ability that can be supplied as a fertilizer in order to enable farming even in poorly alkaline soil (Patent Document 1 and). 2).
- the heterocyclic amino acid compounds described in Patent Documents 1 and 2 are synthesized by a method including the following steps 1 to 4.
- Step 1 A vinyl group of a compound having a vinyl group at one end and an amino group protected by a protective group at the other end is oxidatively cleaved to form an aldehyde, and the aldehyde is reacted with a heterocyclic amino acid (reducing amino).
- Step 2 A step of protecting the carboxyl group of the reaction product of step 1 and deprotecting the protecting group of the amino group;
- Step 3 The reaction product of step 2 is reacted with a compound having a formyl group at one end and a hydroxyl group protected by a protecting group at the other end; and (step 4) the reaction product of step 3.
- a main object of the present invention is to provide a simple method for producing a heterocyclic amino acid compound.
- R 3 is a protecting group for hydrogen atoms or amino groups] The following formula (1): obtained in step A and (B) step A for reacting the compound represented by (1) or a salt thereof.
- R 1a is a hydrogen atom or CO 2 R 1b .
- R 1b is a protecting group for a hydrogen atom or a carboxyl group.
- R 2a is a hydrogen atom or OR 2b and R 2b is a protecting group for a hydrogen atom or a hydroxyl group.
- R 3 is a protecting group for a hydrogen atom or an amino group.
- R 4 is a protecting group for a hydrogen atom or a carboxyl group.
- Step B to convert the cyano group of the compound represented by (1) or a salt thereof into a carboxyl group by hydrolysis. It has been found that a heterocyclic amino acid compound can be easily produced by a method containing. The present inventors have completed the present invention by further studying based on the findings.
- the present invention includes the following aspects.
- [Item 1] The following formula (1): [During the ceremony, R 1a is a hydrogen atom or CO 2 R 1b . R 1b is a protecting group for a hydrogen atom or a carboxyl group. R 2a is a hydrogen atom or OR 2b and R 2b is a protecting group for a hydrogen atom or a hydroxyl group. R 3 is a protecting group for a hydrogen atom or an amino group. R 4 is a protecting group for a hydrogen atom or a carboxyl group. n is an integer of 1 to 3] A method for producing a compound represented by (1) or a salt thereof.
- R 1a is a hydrogen atom or CO 2 R 1b .
- R 1b is a protecting group for a hydrogen atom or a carboxyl group.
- R 2a is a hydrogen atom or OR 2b and R 2b is a protecting group for a hydrogen atom or a hydroxyl group.
- R 3 is a protecting group for a hydrogen atom or an amino group.
- R 4 is a protecting group for a hydrogen atom or a carboxyl group.
- n is the same as above]
- a method comprising the step B of converting a cyano group of a compound represented by (1) or a salt thereof into a carboxyl group by hydrolysis.
- Item 3 Item 2.
- Item 4 Item 3.
- Item 5 Item 3.
- the protecting group for the carboxyl group is an alkyl group, an alkenyl group, or an aralkyl group.
- the protecting group for the hydroxyl group is an alkyl group, an aralkyl group, a silyl group, or a trialkylsilyl group.
- R 1a is a hydrogen atom or CO 2 R 1b .
- R 1b is a protecting group for a hydrogen atom or a carboxyl group.
- R 2a is a hydrogen atom or OR 2b and R 2b is a protecting group for a hydrogen atom or a hydroxyl group.
- R 3 is a protecting group for a hydrogen atom or an amino group.
- R 4 is a protecting group for a hydrogen atom or a carboxyl group.
- n is an integer of 1 to 3]
- the protecting group for the carboxyl group is an alkyl group, an alkenyl group, or an aralkyl group.
- the protecting group for the hydroxyl group is an alkyl group, an aralkyl group, a silyl group, or a trialkylsilyl group.
- Item 8 The compound or salt thereof according to Item 8, wherein the protecting group for the amino group is an alkoxycarbonyl group, an alkenyloxycarbonyl group, or an aralkyloxycarbonyl group.
- the present invention provides a simple method for producing a heterocyclic amino acid compound.
- Cab means that the target carbon number is an integer of a or more and less than or equal to b .
- protecting group refers to a group used to protect a functional group from a particular chemical reaction.
- carboxyl group protecting group refers to a protecting group commonly used to protect a carboxyl group in the art, such as PROTECTIVE GROUPS in ORGANIC SYNTHESIS (T. W. Green; P. G. It is a concept that includes all protecting groups described in M. Wuts).
- the carboxyl group protecting group includes, for example, an alkyl group which may have one or more substituents, an alkenyl group which may have one or more substituents, and one or more substituents. Examples thereof include a cycloalkyl group which may have one or more substituents, an aryl group which may have one or more substituents, and an aralkyl group which may have one or more substituents.
- hydroxyl group protecting group is described in the protecting groups commonly used to protect hydroxyl groups in the art, such as PROTECTIVE GROUPS in ORGANIC SYNTHESIS (T. W. Green; by P. G. M. Wuts). It is a concept that includes all protecting groups.
- the protecting group for the hydroxyl group include an alkyl group which may have one or more substituents, a cycloalkyl group which may have one or more substituents, and one or more substituents.
- An aryl group that may have one or more substituents an aralkyl group that may have one or more substituents, a 2-tetrahydropyranyl group that may have one or more substituents, and one or more substituents.
- amino group protecting group refers to a protecting group commonly used to protect an amino group in the art, such as PROTECTIVE GROUPS in ORGANIC SYNTHESIS (T. W. Green; P. G. It is a concept that includes all protecting groups described in M. Wuts).
- protective group for the amino group include an alkylcarbonyl group which may have one or more substituents, an arylcarbonyl group which may have one or more substituents, and one or more substituents.
- Aralkylcarbonyl group which may have one or more substituents, an alkoxycarbonyl group, which may have one or more substituents, and an alkenyloxycarbonyl group, which may have one or more substituents, one or more.
- alkyl group is a concept that includes a linear alkyl group and a branched chain alkyl group.
- examples of the alkyl group include a linear C 1-10 alkyl group such as a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group and an n-hexyl group; an isopropyl group and an isobutyl group.
- Examples thereof include branched C 3-10 alkyl groups such as s-butyl group, t-butyl group, isopentyl group, neopentyl group, isohexyl group, isoheptyl group, isooctyl group and 2-ethylhexyl group.
- alkenyl group is a concept that includes a linear alkenyl group and a branched chain alkenyl group.
- alkenyl group examples include a linear C 1-10 alkenyl group such as a vinyl group, a 1-propenyl group and an allyl group; and a branched chain C 3- such as a 1-methylethenyl group and a 2-methyl-2-propenyl group. 10 Alkenyl group and the like can be mentioned.
- cycloalkyl group refers to a cyclic alkyl group.
- examples of the cycloalkyl group include a C 5-20 cycloalkyl group such as a cyclopentyl group and a cyclohexyl group.
- aryl group refers to a monovalent aromatic hydrocarbon group.
- examples of the aryl group include a C 6-20 aryl group such as a phenyl group and a naphthyl group.
- aralkyl group refers to an arylalkyl group.
- examples of the aralkyl group include a C7-20 aryl group such as a benzyl group, a trityl group and a phenethyl group.
- alkylcarbonyl group refers to a group represented by the formula: RA -CO- (where RA is an alkyl group).
- alkylcarbonyl group include a methylcarbonyl group (acetyl group), an ethylcarbonyl group, a propylcarbonyl group (n-propylcarbonyl group, an isopropylcarbonyl group), a butylcarbonyl group (n-butylcarbonyl group, an isobutylcarbonyl group, s).
- -C 1-10 alkylcarbonyl group such as (butylcarbonyl group, t-butylcarbonyl group) and the like can be mentioned.
- arylcarbonyl group refers to a group represented by the formula: RB - CO- (in the formula, RB is an aryl group).
- RB is an aryl group.
- examples of the arylcarbonyl group include a C6-20 arylcarbonyl group such as a benzoyl group and a naphthoyl group.
- aralkylcarbonyl group refers to a group represented by the formula: RC -CO- (in which RC is an aralkyl group).
- aralkylcarbonyl group include a C7-20 aralkylcarbonyl group such as a benzylcarbonyl group and a phenethylcarbonyl group.
- alkoxycarbonyl group refers to a group represented by the formula: RD -O-CO- (where RD is an alkyl group).
- alkoxycarbonyl group include a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group (n-propoxycarbonyl group, isopropoxycarbonyl group), and a butoxycarbonyl group (n-butoxycarbonyl group, isobutoxycarbonyl group, s-butoxy). Examples thereof include C 1-10 alkoxycarbonyl groups such as carbonyl group and t-butoxycarbonyl group).
- alkenyloxycarbonyl group refers to a group represented by the formula: RE-O- CO- (where RE is an alkenyl group).
- alkenyloxycarbonyl group include a C 1-10 alkenyloxycarbonyl group such as a vinyloxycarbonyl group, an allyloxycarbonyl group and a propenyloxycarbonyl group.
- aryloxycarbonyl group refers to a group represented by the formula: RF-O- CO- (where RF is an aryl group).
- RF is an aryl group
- examples of the aryloxycarbonyl group include a C6-20 aryloxycarbonyl group such as a phenyloxycarbonyl group and a naphthyloxycarbonyl group.
- aralkyloxycarbonyl group refers to a group represented by the formula: RG -O-CO- (where RG is an aralkyl group).
- RG is an aralkyl group.
- examples of the aralkyloxycarbonyl group include a C7-20 aralkyloxycarbonyl group such as a benzyloxycarbonyl group, a 9-fluorenylmethyloxycarbonyl group and a phenethyloxycarbonyl group.
- alkylcarbonyloxy group refers to a group represented by the formula : RH-CO-O- (where RH is an alkyl group).
- RH is an alkyl group.
- examples of the alkylcarbonyloxy group include an acetyloxy group, a propionyloxy group (n-propionyloxy group, isopropionyloxy group) and a butyryloxy group (n-butyryloxy group, isobutyryloxy group, s-butyryloxy group, t- Examples thereof include a C 1-10 alkylcarbonyloxy group (butyryloxy group) and the like.
- alkylsulfonyl group refers to a group represented by the formula: RI -SO 2- (in the formula, RI is an alkyl group).
- RI is an alkyl group.
- alkylsulfonyl group include a C 1-10 alkylsulfonyl group such as a methylsulfonyl group and an ethylsulfonyl group.
- arylsulfonyl group refers to a group represented by the formula: RJ - SO2- (in the formula, RJ is an aryl group).
- RJ is an aryl group.
- the arylsulfonyl group include a C6-20 arylsulfonyl group such as a phenylsulfonyl group and a naphthylsulfonyl group.
- the "substituent” means another atom or atomic group that replaces the hydrogen atom to be substituted.
- substituents include, but are not limited to, a halogen atom, a nitro group, an alkoxy group, an alkylcarbonyloxy group and the like.
- halogen atom is a concept including a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- alkoxy group refers to a group represented by the formula: RKO- (wherewise RK is an alkyl group).
- RK is an alkyl group.
- alkoxy group include C such as methoxy group, ethoxy group, propoxy group (n-propoxy group, isopropoxy group) and butoxy group (n-butoxy group, isobutoxy group, s-butoxy group, t-butoxy group). Examples thereof include 1-10 alkoxy groups.
- an alkyl group having one or more substituents include C 1-6 alkoxy C 1-6 alkyl groups such as a methoxymethyl group and an ethoxyethyl group; and C 1- such as a methoxyethoxymethyl group.
- C 1-6 alkyl carbonyloxy C 1-6 alkyl groups and the like can be mentioned.
- aralkyl group having one or more substituents include nitroaralkyl groups such as o-, m-, or p-nitrobenzyl group, 2,4-dinitrobenzyl group; p-chlorobenzyl group, p-.
- a haloaralkyl group such as a bromobenzyl group; a C 1-6 alkoxyaralkyl group such as a p-methoxybenzyl group and the like can be mentioned.
- the silyl group having one or more substituents include a trialkylsilyl group and an alkyldiarylsilyl group.
- the trialkylsilyl group include a tri-C 1-6 alkylsilyl group such as a trimethylsilyl (TMS) group, a triethylsilyl (TES) group, a triisopropylsilyl (TIPS) group and a t-butyldimethylsilyl (TBS) group.
- TMS trimethylsilyl
- TES triethylsilyl
- TIPS triisopropylsilyl
- TBS t-butyldimethylsilyl
- the alkyldiarylsilyl group include a C 1-6 alkyldi C 6-12 arylsilyl group such as a t-butyldiphenylsilyl (TBDPS) group.
- the compound represented by the formula (1) or a salt thereof is an intermediate useful for producing the compound represented by the formula (4) or a salt thereof.
- R 1a is a hydrogen atom or CO 2 R 1b
- R 1b is a hydrogen atom or a protecting group for a carboxyl group.
- R 1b is preferably a protecting group for a carboxyl group, more preferably an alkyl group, an alkenyl group, or an aralkyl group, and further preferably a C 1-6 alkyl group such as a methyl group, an ethyl group, or a t-butyl group.
- C 2-6 alkenyl group such as allyl group; or C 7-20 aralkyl group such as benzyl group and trityl group.
- R 2a is a hydrogen atom or OR 2b
- R 2b is a protecting group for a hydrogen atom or a hydroxyl group.
- R 2b is preferably a protective group for a hydroxyl group, more preferably an alkyl group, an aralkyl group, a silyl group, or a trialkylsilyl group, and more preferably a C such as a methyl group, an ethyl group, or a t-butyl group.
- R 3 is a protecting group for a hydrogen atom or an amino group.
- R 3 is preferably an amino protecting group, more preferably a C 1-6 alkoxycarbonyl group such as an alkoxycarbonyl group, an alkenyloxycarbonyl group, or an aralkyloxycarbonyl group, and even more preferably a t-butoxycarbonyl group;
- a C 2-6 alkenyloxycarbonyl group such as an allyloxycarbonyl group; or a C7-20 aralkyloxycarbonyl group such as a benzyloxycarbonyl group or a 9-fluorenylmethyloxycarbonyl group.
- R 4 is a protecting group for a hydrogen atom or a carboxyl group.
- R 4 is preferably a protecting group for a carboxyl group, more preferably an alkyl group, an alkenyl group, or an aralkyl group, and further preferably a C 1-6 alkyl group such as a methyl group, an ethyl group, or a t-butyl group.
- C 2-6 alkenyl group such as allyl group; or C 7-20 aralkyl group such as benzyl group and trityl group.
- R 1a is a hydrogen atom or CO 2 R 1b
- R 1b is a protective group for a carboxyl group
- R 2a is a hydrogen atom or OR 2b
- R 2b is a protective group for a hydroxyl group
- R 3 is a hydrogen atom
- R 4 is a protective group for a carboxyl group.
- R 1a is CO 2 R 1b
- R 1b is a carboxyl protecting group
- R 2a is OR 2b
- R 2b is a hydroxyl group protecting group
- R 3 is a hydrogen atom.
- R 4 is preferably a protecting group for a carboxyl group.
- R 1a is CO 2 R 1b
- R 1b is a protecting group for a carboxyl group
- R 2a is a hydrogen atom
- R 3 is a hydrogen atom
- R 4 is a protecting group for a carboxyl group. It is preferably a group.
- R 1a is a hydrogen atom
- R 2a is OR 2b
- R 2b is a hydroxyl group protecting group
- R 3 is a hydrogen atom
- R 4 is a carboxyl protecting group. It is preferable to have.
- N is an integer of 1 to 3.
- the salt of the compound represented by the formula (1) is not particularly limited.
- Such salts include, for example, inorganic acid salts such as hydrochlorides, sulfates, nitrates; carboxylates such as acetates, trifluoroacetates, oxalate benzoates; methanesulfonates, p-toluene.
- Organic acid salts such as sulfonates such as sulfonates; alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as magnesium salts and calcium salts; ammonium salts such as dimethylammonium and triethylammonium. Be done.
- the salt is preferably an inorganic acid salt, more preferably a hydrochloride salt.
- the compound represented by the formula (1) or a salt thereof includes optical isomers such as enantiomers and diastereomers, and racemates.
- the method for producing a compound represented by the formula (1) or a salt thereof is a compound represented by the formula (2) or a salt thereof. , Acrolein, cyanide, and step A of reacting the compound represented by the formula (3) or a salt thereof.
- R4 and n of the formula (2) are as described in the formula (1). Either the compound represented by the formula (2) or a salt thereof may be used. In the case of the salt of the compound, the salt of the compound represented by the formula (2) is not particularly limited, but the same salt as the salt exemplified by the salt of the compound represented by the formula (1) can be mentioned. When the salt affects the reaction, it is preferably desalted before use.
- the amount of acrolein used is, for example, 0.1 mol or more, preferably 0.5 mol or more, and more preferably 1 mol or more with respect to 1 mol of the compound represented by the formula (2) or a salt thereof.
- the amount of acrolein used is, for example, 5 mol or less, preferably 4 mol or less, more preferably 3 mol or less, still more preferably 2 mol or less, based on 1 mol of the compound represented by the formula (2) or a salt thereof. Is.
- the cyanizing agent examples include hydrogen cyanide; alkali metal cyanide such as sodium cyanide and potassium cyanide; and organic cyanide reagents such as trimethylsilyl cyanide and acetone cyanohydrin.
- the amount of the cyanide agent used is, for example, 0.1 mol or more, preferably 0.5 mol or more, and more preferably 1 mol or more with respect to 1 mol of the compound represented by the formula (2) or a salt thereof.
- the amount of the cyanide agent used is, for example, 5 mol or less, preferably 4 mol or less, more preferably 3 mol or less, still more preferably 2 mol, based on 1 mol of the compound represented by the formula (2) or a salt thereof. It is less than a mole.
- R 1a , R 2a , and R 3 of the formula (3) are as described in the formula (1).
- Either the compound represented by the formula (3) or a salt thereof may be used.
- the salt of the compound represented by the formula (3) is not particularly limited, but the same salt as the salt exemplified by the salt of the compound represented by the formula (1) can be mentioned.
- the salt affects the reaction, it is preferably desalted before use.
- the amount of the compound represented by the formula (3) or a salt thereof used is, for example, 0.1 mol or more, preferably 0.5 mol or more, based on 1 mol of the compound represented by the formula (2) or a salt thereof. More preferably, it is 1 mol or more.
- the amount of the compound represented by the formula (3) or a salt thereof used is, for example, 5 mol or less, preferably 4 mol or less, more preferably 1 mol or less, based on 1 mol of the compound represented by the formula (2) or a salt thereof. Is 3 mol or less, more preferably 2 mol or less.
- the reaction of the compound represented by the formula (2) or a salt thereof, acrolein, a cyanide agent, and the compound represented by the formula (3) or a salt thereof usually proceeds by mixing these components.
- the mixing order is not particularly limited, and the reaction proceeds regardless of the mixing order.
- the compound represented by the formula (2) or a salt thereof is mixed with acrolein, then mixed with the compound represented by the formula (3) or a salt thereof, and finally mixed with a cyanating agent. Examples thereof include a method (hereinafter referred to as “mixing method 1”).
- a method of mixing a compound represented by the formula (2) or a mixture of a salt thereof and acrolein with a mixture of a compound represented by the formula (3) and a cyanating agent (hereinafter referred to as a method). "Mixing method 2"). Further, as another example, a method of batch mixing the compound represented by the formula (2) or a salt thereof, acrolein, a cyanide agent, and the compound represented by the formula (3) or a salt thereof (hereinafter, “mixing”). Method 3 ”).
- Step A is usually carried out in the presence of a solvent.
- the solvent may be a polar solvent or a non-polar solvent.
- the polar solvent include water; halogenated hydrocarbons such as methylene chloride; alcohols such as isopropanol; ethers such as tetrahydrofuran and dioxane; and nitriles such as acetonitrile.
- the non-polar solvent include aromatic hydrocarbons such as toluene.
- the solvent may be used alone or in combination of two or more.
- the solvent is preferably a polar solvent, more preferably an ether such as tetrahydrofuran.
- Step A can be performed in the absence or presence of a base.
- a base examples include triethylamine (TEA), diisopropylethylamine (DIPEA), tetramethylguanidine (TMG), diazabicyclooctane (DABCO), diazabicyclononene (DBN), diazabicycloundecene (DBU), and tria.
- TEA triethylamine
- DIPEA diisopropylethylamine
- TMG tetramethylguanidine
- DABCO diazabicyclooctane
- DBN diazabicyclononene
- DBU diazabicycloundecene
- TBD zavicyclodecene
- MTBD N-methyl-triazabicyclodecene
- DMAP 4-dimethylaminopyridine
- the amount of the base used is, for example, 0.005 mol or more, preferably 0.01 mol or more, with respect to 1 mol of the compound represented by the formula (2) or a salt thereof.
- the amount of the base used is, for example, 0.1 mol or less, preferably 0.05 mol or less, with respect to 1 mol of the compound represented by the formula (2) or a salt thereof.
- Step A can be performed in the absence or presence of acid.
- the acid include, but are not limited to, aliphatic carboxylic acids such as acetic acid, trifluoroacetic acid and pivalic acid; aromatic carboxylic acids such as benzoic acid; and sulfonic acids such as tosylic acid.
- One type of acid can be used alone or two or more types can be used in combination.
- the acid is preferably an aliphatic carboxylic acid such as acetic acid or trifluoroacetic acid.
- the amount of the acid used is, for example, 0.005 mol or more, preferably 0.01 mol or more, and more preferably 0.02 mol or more with respect to 1 mol of the compound represented by the formula (2) or a salt thereof.
- the amount of the acid used is, for example, 5 mol or less, preferably 3 mol or less, and more preferably 1 mol or less with respect to 1 mol of the compound represented by the formula (2) or a salt thereof.
- the reaction temperature is not particularly limited as long as the reaction proceeds.
- the reaction temperature is, for example, ⁇ 100 ° C. or higher, preferably ⁇ 90 ° C. or higher, and more preferably ⁇ 80 ° C. or higher.
- the reaction temperature can be in the range of room temperature, for example, 5 to 35 ° C.
- the mixing of the compound represented by the formula (2) or a salt thereof and acrolein is, for example, ⁇ 15 ° C. or lower, preferably ⁇ 30 ° C. It may be carried out at ° C. or lower, more preferably ⁇ 40 ° C. or lower, still more preferably ⁇ 50 ° C. or lower, and other mixing may be carried out at room temperature, for example, in the range of 5 to 35 ° C.
- the method for producing the compound represented by the formula (1) or a salt thereof may further include a purification step in addition to the step A.
- the purification method include filtration, extraction, concentration, chromatography, or a combination thereof.
- the method for producing the compound represented by the formula (1) or a salt thereof may further include an optical resolution step in addition to the step A.
- R 1c is a hydrogen atom or a carboxyl group
- R 2c is a hydrogen atom or a hydroxyl group.
- the combination of R 1c and R 2c is a combination in which R 1c is a carboxyl group and R 2c is a hydroxyl group, R 1c is a carboxyl group and R 2c is a hydrogen atom, or R.
- a combination in which 1c is a hydrogen atom and R 2c is a hydroxyl group is preferable.
- N is an integer of 1 to 3.
- the salt of the compound represented by the formula (4) is not particularly limited, and examples thereof include the same salts as those exemplified by the salt of the compound represented by the formula (1).
- Method for producing a compound represented by the formula (4) or a salt thereof is a method for producing a compound represented by the formula (1) or a salt thereof.
- a step B of converting a cyano group into a carboxyl group by hydrolysis is included.
- the method for hydrolyzing the cyano group is not particularly limited, but it is usually hydrolyzed with an acid.
- the acid include inorganic acids such as hydrochloric acid, phosphoric acid, sulfuric acid and nitric acid.
- One type of acid can be used alone or two or more types can be used in combination.
- the amount of the acid used is, for example, 1 mol or more, preferably 2 mol or more, and more preferably 3 mol or more with respect to 1 mol of the compound represented by the formula (4) or a salt thereof.
- the amount of the acid used is, for example, 100 mol or less, preferably 50 mol or less, and more preferably 30 mol or less with respect to 1 mol of the compound represented by the formula (4) or a salt thereof.
- the reaction temperature for hydrolysis is not particularly limited as long as the reaction proceeds.
- the reaction temperature is, for example, 80 ° C. or higher, preferably 90 ° C. or higher, and more preferably 100 ° C. or higher.
- the reaction temperature is, for example, 150 ° C. or lower, preferably 140 ° C. or lower, and more preferably 130 ° C. or lower.
- the protecting group is simultaneously removed in the hydrolysis reaction of step B, but the protecting group that is not removed in the hydrolysis reaction of step B may further include a step of removing (deprotecting) the protecting group. good.
- the deprotection method can be appropriately selected depending on the type of protecting group, and for example, PROTECTIVE GROUPS in ORGANIC SYNTHESIS (written by T.W.Green; P.G.M.Wuts) may be referred to.
- the method for producing the compound represented by the formula (4) or a salt thereof preferably includes step A in addition to step B. Further, the method for producing the compound represented by the formula (4) or a salt thereof may further include a purification step. Examples of the purification method include filtration, extraction, concentration, chromatography, recrystallization, or a combination thereof. The method for producing the compound represented by the formula (4) or a salt thereof may further include an optical resolution step.
- tBu proline (1) (59 mg, 0.34 mmol) was dissolved in THF (1.2 mL).
- DBU 0.1 M THF solution
- Acrolein (2) (25 ⁇ L, 0.34 mmol) was added to the reaction solution, and the mixture was stirred at ⁇ 78 ° C. for 2 hours.
- tBu-aminobutyric acid (3) (79 mg, 0.34 mmol) dissolved in THF (0.5 mL)
- TFA 0.1 M THF solution 34 ⁇ L, 0.0034 mmol
- tBu proline (1) (123 mg, 0.71 mmol) was dissolved in THF (3.6 mL).
- DBU (5 ⁇ L, 0.035 mmol) was added and cooled to ⁇ 78 ° C.
- Acrolein (2) (53 ⁇ L, 0.71 mmol) was added to the reaction solution, and the mixture was stirred at ⁇ 78 ° C. for 2 hours.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Hydrogenated Pyridines (AREA)
- Pyrrole Compounds (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
Description
(工程1)一方の末端にビニル基及び他方の末端に保護基で保護されたアミノ基を有する化合物のビニル基を酸化開裂させてアルデヒドとし、そのアルデヒドを複素環含有アミノ酸と反応(還元的アミノ化反応)させる工程;
(工程2)工程1の反応生成物のカルボキシル基を保護し、アミノ基の保護基を脱保護する工程;
(工程3)工程2の反応生成物を、一方の末端にホルミル基及び他方の末端に保護基で保護されたヒドロキシル基を有する化合物と反応させる工程;及び
(工程4)工程3の反応生成物のヒドロキシル基の保護基等を脱保護する工程。
(A)下記式(2):
R4は、水素原子又はカルボキシル基の保護基であり、
nは、1~3の整数である]
で表される化合物又はその塩、アクロレイン、シアン化剤、及び下記式(3):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基である]
で表される化合物又はその塩を反応させる工程A、及び
(B)工程Aで得られる、下記式(1):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基であり、
R4は、水素原子又はカルボキシル基の保護基であり、
nは、前記と同じである]
で表される化合物又はその塩のシアノ基を加水分解によりカルボキシル基に変換する工程B
を含む方法により複素環含有アミノ酸化合物を簡便に製造できることを見出した。本発明者らは当該知見を基に更に検討を重ねて本発明を完成した。
[項1]
下記式(1):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基であり、
R4は、水素原子又はカルボキシル基の保護基であり、
nは、1~3の整数である]
で表される化合物又はその塩を製造する方法であって、
下記式(2):
で表される化合物又はその塩、アクロレイン、シアン化剤、及び下記式(3):
で表される化合物又はその塩を反応させる工程Aを含む、方法。
[項2]
下記式(4):
R1cは、水素原子又はカルボキシル基であり、
R2cは、水素原子又はヒドロキシル基であり、
nは、1~3の整数である]
で表される化合物又はその塩を製造する方法であって、
下記式(1):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基であり、
R4は、水素原子又はカルボキシル基の保護基であり、
nは、前記と同じである]
で表される化合物又はその塩のシアノ基を加水分解によりカルボキシル基に変換する工程Bを含む、方法。
[項3]
前記工程Bが酸の存在下で実施される、項2に記載の方法。
[項4]
前記酸が無機酸である、項3に記載の方法。
[項5]
前記酸が塩酸、リン酸、硫酸、及び硝酸からなる群より選択される少なくとも一種である、項3又は4に記載の方法。
[項6]
前記カルボキシル基の保護基が、アルキル基、アルケニル基、又はアラルキル基であり、
前記ヒドロキシル基の保護基が、アルキル基、アラルキル基、シリル基、又はトリアルキルシリル基であり、
前記アミノ基の保護基が、アルコキシカルボニル基、アルケニルオキシカルボニル基、又はアラルキルオキシカルボニル基である、項2~5のいずれに記載の方法。
[項7]
さらに、下記式(2):
で表される化合物又はその塩、アクロレイン、シアン化剤、及び下記式(3):
で表される化合物又はその塩を反応させて、前記式(1)で表される化合物を得る工程Aを含む、項2~6のいずれかに記載の方法。
[項8]
下記式(1):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基であり、
R4は、水素原子又はカルボキシル基の保護基であり、
nは、1~3の整数である]
で表される化合物又はその塩。
[項9]
前記カルボキシル基の保護基が、アルキル基、アルケニル基、又はアラルキル基であり、
前記ヒドロキシル基の保護基が、アルキル基、アラルキル基、シリル基、又はトリアルキルシリル基であり、
前記アミノ基の保護基が、アルコキシカルボニル基、アルケニルオキシカルボニル基、又はアラルキルオキシカルボニル基である、項8に記載の化合物又はその塩。
本明細書において、「Ca-b」とは、対象の炭素数がa以上b以下の整数であることを意味する。
式(1)で表される化合物又はその塩は、式(4)で表される化合物又はその塩を製造するのに有用な中間体である。
一実施態様において、式(1)で表される化合物又はその塩を製造する方法は、式(2)で表される化合物又はその塩、アクロレイン、シアン化剤、及び式(3)で表される化合物又はその塩を反応させる工程Aを含む。
R1cは、水素原子又はカルボキシル基であり、R2cは、水素原子又はヒドロキシル基である。R1c及びR2cの組み合わせとしては、R1cがカルボキシル基であり、且つ、R2cがヒドロキシル基である組み合わせ、R1cがカルボキシル基であり、且つ、R2cが水素原子である組み合わせ、又はR1cが水素原子であり、且つ、R2cがヒドロキシル基である組み合わせが好ましい。
一実施態様において、式(4)で表される化合物又はその塩の製造方法は、式(1)で表される化合物又はその塩のシアノ基を加水分解によりカルボキシル基に変換する工程Bを含む。
tBu:ターシャリーブチル
THF:テトラヒドロフラン
Et2O:ジエチルエーテル
DBU:ジアザビシクロウンデセン
TFA:トリフルオロ酢酸
TMSCN:トリメチルシリルシアミニド
iPrOH:イソプロパノール
。Et2Oで抽出し、有機相をMgSO4で乾燥、濾過、濃縮した(NMR収率80%)。濃縮残渣をカラムクロマトグラフィー(n-ヘキサン/酢酸エチル(4:1)で精製し、黄色液体の標題化合物(4) (108mg, 68%)を得た。
1H NMR(400 MHz, CD3OD): 4.10 (dd, J = 4.4, 8.4Hz, 1H), 4.06 (dd, J = 5.3, 7.2Hz, 1H), 3.85 (t, J = 6.5Hz, 1H), 3.80 (dd, J = 6.4, 7.3Hz, 1H), 3.19-3.14 (m, 1H), 3.09-3.04 (m, 1H), 2.96-2.85 (m, 2H), 2.07-2.54 (m, 2H), 2.34 (ddd, J = 8.0, 12.4, 16Hz, 1H), 2.15-2.06 (m, 1H), 2.01-1.74 (m, 7H), 1.48 (s, 18H), 1.99 (s, 9H)
1H NMR(500 MHz, D2O): 4.43 (dd, J = 4.3, 8.1Hz, 1H), 4.20 (td, J = 5.5, 9.6Hz, 1H), 3.96 (dd, J = 4.4, 8.6Hz, 1H), 3.91 (t, J = 6.7Hz, 1H), 3.82 (ddd, J = 3.7, 7.2, 11Hz, 1H), 3.60-3.37 (m, 2H), 3.34-3.18 (m, 3H), 2.56-2.50 (m, 1H), 2.37-2.26 (m, 3H), 2.23-1.95 (m, 4H)
Claims (9)
- 下記式(1):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基であり、
R4は、水素原子又はカルボキシル基の保護基であり、
nは、1~3の整数である]
で表される化合物又はその塩を製造する方法であって、
下記式(2):
で表される化合物又はその塩、アクロレイン、シアン化剤、及び下記式(3):
で表される化合物又はその塩を反応させる工程Aを含む、方法。 - 下記式(4):
R1cは、水素原子又はカルボキシル基であり、
R2cは、水素原子又はヒドロキシル基であり、
nは、1~3の整数である]
で表される化合物又はその塩を製造する方法であって、
下記式(1):
R1aは、水素原子又はCO2R1bであり、
R1bは、水素原子又はカルボキシル基の保護基であり、
R2aは、水素原子又はOR2bであり、
R2bは、水素原子又はヒドロキシル基の保護基であり、
R3は、水素原子又はアミノ基の保護基であり、
R4は、水素原子又はカルボキシル基の保護基であり、
nは、前記と同じである]
で表される化合物又はその塩のシアノ基を加水分解によりカルボキシル基に変換する工程Bを含む、方法。 - 前記工程Bが酸の存在下で実施される、請求項2に記載の方法。
- 前記酸が無機酸である、請求項3に記載の方法。
- 前記酸が塩酸、リン酸、硫酸、及び硝酸からなる群より選択される少なくとも一種である、請求項3又は4に記載の方法。
- 前記カルボキシル基の保護基が、アルキル基、アルケニル基、又はアラルキル基であり、
前記ヒドロキシル基の保護基が、アルキル基、アラルキル基、シリル基、又はトリアルキルシリル基であり、
前記アミノ基の保護基が、アルコキシカルボニル基、アルケニルオキシカルボニル基、又はアラルキルオキシカルボニル基である、請求項2~5のいずれに記載の方法。 - 前記カルボキシル基の保護基が、アルキル基、アルケニル基、又はアラルキル基であり、
前記ヒドロキシル基の保護基が、アルキル基、アラルキル基、シリル基、又はトリアルキルシリル基であり、
前記アミノ基の保護基が、アルコキシカルボニル基、アルケニルオキシカルボニル基、又はアラルキルオキシカルボニル基である、請求項8に記載の化合物又はその塩。
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WO2020045247A1 (ja) * | 2018-08-29 | 2020-03-05 | 国立大学法人徳島大学 | 複素環含有アミノ酸化合物及びその塩、錯体、組成物、肥料並びに植物成長調整剤 |
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- 2021-10-08 CA CA3208364A patent/CA3208364A1/en active Pending
- 2021-10-08 US US18/261,383 patent/US20240092734A1/en active Pending
- 2021-10-08 AU AU2021419873A patent/AU2021419873A1/en active Pending
- 2021-10-08 WO PCT/JP2021/037366 patent/WO2022153626A1/ja active Application Filing
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Patent Citations (5)
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JPH0444530B2 (ja) | 1986-01-10 | 1992-07-22 | Matsushita Electric Ind Co Ltd | |
WO2008059782A1 (fr) * | 2006-11-14 | 2008-05-22 | Suntory Holdings Limited | Procédé de production efficace d'un composé d'acide mugineique |
WO2017082111A1 (ja) * | 2015-11-09 | 2017-05-18 | 国立大学法人徳島大学 | 新規な複素環含有アミノ酸化合物及びその用途 |
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WO2020045247A1 (ja) * | 2018-08-29 | 2020-03-05 | 国立大学法人徳島大学 | 複素環含有アミノ酸化合物及びその塩、錯体、組成物、肥料並びに植物成長調整剤 |
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