Asymmetric synthesis of (<i>R</i>)-6-amino-1-methyl-4-(3-methyl-benzyl)hexahydro-1<i>H</i>-1,4-diazepine from L-asparagine
作者:Shiro Kato、Hiroshi Harada、Toshiya Mode
DOI:10.1002/jhet.5570340516
日期:1997.9
hexahydro-1H-1,4-diazepine ring was achieved by the intramolecular ami-dation of the optically active aminocarboxylic acid 18 or reductive cyclization of the optically active aminoaldehyde 25. Compounds 18 and 25 were prepared from L-asparagine via the key aziridine derivatives 15 and 22, respectively, with retention of the configuration. The intramolecular aziridine ring opening reaction of 29 gave the
有效的不对称合成(R)-6-氨基-1-甲基-4-(3-甲基乙基苄基)六氢-1 H -1,4-二氮杂[[ R -2)]用作(R的胺部分)-1,一种有效且选择性的5-HT 3受体拮抗剂。的六氢形成ħ环二氮杂-1,4是由光学活性的氨基羧酸的分子内AMI-dation实现18或还原性环化的光学活性氨基醛25化合物18和25从L-天冬酰胺,制备经由关键氮丙啶衍生物15和22,分别保留配置。分子内氮丙啶开环反应29得到的是氮丙啶环的C 2 N键裂解产物哌嗪5一30作为主要产物,以及所需的7元环hexahydro-1 H -1, 4-二氮杂product产品19。