申请人:Daiso Co., Ltd.
公开号:US07750162B2
公开(公告)日:2010-07-06
A process for the preparation of a nonnatural amino acid represented by the following formula (C):
which is characterized by reacting a compound represented by the following formula (A1), a compound represented by the following formula (A2) and a compound represented by the following formula (A3) (step 1):
to form a compound represented by the following formula (B):
and then subjecting the compound (B) to deprotection of protective groups of carboxyl groups and to decarboxylation (wherein X1 and X2 are a leaving group, R1 is an aromatic group, an unsaturated heterocyclic group, or R6CO group, R2 and R3 are a protected carboxyl group, R4 is a protected amino group, R5 is hydrogen atom, an aliphatic hydrocarbon group, an aromatic group, or a heterocyclic group, R6 is an aromatic group or an unsaturated heterocyclic group, etc., and p, q and r are an integer of 0 to 10).
一种制备以下式(C)所代表的非天然氨基酸的方法,其特征在于将以下式(A1)所代表的化合物、以下式(A2)所代表的化合物和以下式(A3)所代表的化合物反应(步骤1):以形成以下式(B)所代表的化合物;然后对化合物(B)进行羧基保护基的去保护和脱羧(其中X1和X2是离去基,R1是芳香基、不饱和杂环基或R6CO基,R2和R3是保护羧基,R4是保护氨基,R5是氢原子、脂肪族碳氢基、芳香基或杂环基,R6是芳香基或不饱和杂环基等,p、q和r是0至10的整数)。