METHOD FOR SYNTHESIZING OPTICALLY ACTIVE a-AMINO ACID USING CHIRAL METAL COMPLEX COMPRISING AXIALLY CHIRAL N-(2-ACYLARYL)-2-[5,7-DIHYDRO-6H-DIBENZO[c,e]AZEPIN-6-YL] ACETAMIDE COMPOUND AND AMINO ACID
申请人:HAMARI CHEMICALS, LTD.
公开号:US20160102045A1
公开(公告)日:2016-04-14
Objects of the present invention are to provide an industrially applicable method for producing an optically active α-amino acid in high yield and in a highly enantioselective manner, to provide a simple production method of an optically active α,α-disubstituted α-amino acid, and to provide an intermediate useful for the above production methods of an optically active α-amino acid and an optically active α,α-disubstituted α-amino acid.
The present invention provides a production method of an optically active α-amino acid or a salt thereof, the production method comprising introducing a substituent into the α carbon in the α-amino acid moiety of a metal complex represented by the following Formula (1):
by an alkylation reaction, an aldol reaction, the Michael reaction, or the Mannich reaction, and releasing an optically pure α-amino acid enantiomer or a salt thereof by acid decomposition of the metal complex.
Advanced asymmetric synthesis of (1R,2S)-1-amino-2-vinylcyclopropanecarboxylic acid by alkylation/cyclization of newly designed axially chiral Ni(II) complex of glycine Schiff base
作者:Aki Kawashima、Shuangjie Shu、Ryosuke Takeda、Akie Kawamura、Tatsunori Sato、Hiroki Moriwaki、Jiang Wang、Kunisuke Izawa、José Luis Aceña、Vadim A. Soloshonok、Hong Liu
DOI:10.1007/s00726-015-2138-3
日期:2016.4
Asymmetricsynthesis of (1R,2S)-1-amino-2-vinylcyclopropanecarboxylic acid (vinyl-ACCA) is in extremely high demand due to the pharmaceutical importance of this tailor-made, sterically constrained α-amino acid. Here we report the development of an advanced procedure for preparation of the target amino acid via two-step SN2 and SN2′ alkylation of novel axially chiral nucleophilic glycine equivalent
由于这种特制的,空间受限的α-氨基酸的药物重要性,对(1R,2S)-1-氨基-2-乙烯基环丙烷羧酸(乙烯基-ACCA)的不对称合成的需求非常高。在这里,我们报告了通过新型的轴向手性亲核甘氨酸等效物的两步S N 2和S N 2'烷基化制备目标氨基酸的高级程序的开发。优异的收率和非对映选择性以及可靠且容易的可扩展性使该方法可立即用于实际合成(1 R,2 S)-乙烯基-ACCA的方法。
축비대칭을 갖는 N-(2-아실아릴)-2-[5,7-디하이드로-6H-디벤조[c,e]아제핀-6-일]아세트아미드 화합물과 아미노산으로 이루어지는 키랄 금속 착물을 사용하는 광학 활성 α-아미노산의 합성 방법
본 발명의 과제는, 고수율이면서 고에난티오 선택적으로 광학 활성 α-아미노산을 제조하는 공업화 가능한 제조 방법을 제공하는 것, 광학 활성 α,α-2치환 α-아미노산의 간편한 제조 방법을 제공하는 것, 또한, 상기 광학 활성 α-아미노산 및 α,α-2치환 α-아미노산의 제조 방법에 유용한 중간체를 제공하는 것을 과제로 한다. 하기 식(1)로 나타내어지는 금속 착물의 α-아미노산 부분 구조의 α탄소에, 알킬화 반응, 알돌 반응, 마이클 반응, 또는 마니히 반응에 의해 치환기를 도입하고, 그 후, 산에 의해 금속 착물을 분해함으로써 광학적으로 순수한 α-아미노산 에난티오머 또는 그 염을 유리시키는 것을 특징으로 하는, 광학 활성 α-아미노산 또는 그 염의 제조 방법을 제공한다.
Asymmetric Synthesis of Aromatic and Heteroaromatic α-Amino Acids Using a Recyclable Axially Chiral Ligand
作者:Jia Li、Shengbin Zhou、Jiang Wang、Aki Kawashima、Hiroki Moriwaki、Vadim A. Soloshonok、Hong Liu
DOI:10.1002/ejoc.201501442
日期:2016.2
This work introduces a new chiral nucleophilic glycine equivalent containing a recyclable axially chiralligand. This glycine reagent undergoes alkylation with various benzylic bromides to give aromatic and heteroaromatic α‐aminoacids of high pharmaceutical potential. The alkylation products were typically isolated in >80 % yield with excellent diastereoselectivity (up to 99:1).
Asymmetric synthesis of α-deuterated α-amino acids
作者:Ryosuke Takeda、Hidenori Abe、Norio Shibata、Hiroki Moriwaki、Kunisuke Izawa、Vadim A. Soloshonok
DOI:10.1039/c7ob01720k
日期:——
α-Deuterated-α-amino acids represent a very special class of stable isotopically labeled compounds, used in advanced biomedical research. Herein, we disclose a generalized approach for the preparation of α-2H-α-amino acids in enantiomerically pure form and with up to 99% deuteration. The reaction chemistry involved in this process is based on the dynamic kinetic resolution of racemates or (S)–(R) interconversion