申请人:——
公开号:US20030187301A1
公开(公告)日:2003-10-02
A process for preparing 5,6-diethyl-2,3-dihydro-1H-inden-2-amine and acid addition salts thereof from 2-aminoindan. The process comprises protecting the amino group of 2-aminoindan, acetylating the ring in the protected compound, reducing the acetyl group to ethyl to form a monoethyl derivative, acetylating the monoethyl derivative, reducing the acetyl group to form a diethyl derivative, deprotecting the latter by hydrolysis and recovering the product in free or salt form. The process does not use deleterious Grignard reagents or nitrites such as isoamyl nitrite, and provides high regioselectivity and high yield of 5,6-diethyl-2,3-dihydro-1H-inden-2-amine. In addition, the process uses acetyl halide as both a reactant and a solvent.
一种从2-氨基茚制备5,6-二乙基-2,3-二氢-1H-茚-2-胺及其酸盐的方法。该方法包括保护2-氨基茚的氨基,使保护化合物中的环乙酰化,将乙酰基还原为乙基以形成单乙基衍生物,对单乙基衍生物乙酰化,将乙酰基还原为二乙基衍生物,通过水解去除后者的保护基,并以自由形式或盐形式回收产物。该方法不使用有害的格氏试剂或亚硝酸盐,如异戊基亚硝酸酯,并提供高区域选择性和高产率的5,6-二乙基-2,3-二氢-1H-茚-2-胺。此外,该方法使用乙酰卤代物既作为反应物又作为溶剂。