Disclosed is a process for the enantio-selective synthesis of the compound of Formula I and related compounds. The process comprises the synthesis of the benzofuranyl carboxaldehyde; introduction of the benzylic amine functionality with control of the absolute stereochemistry; preparation of the azetidinone fragment and its coupling to the benzofuranyl amine fragments. The carboxylic acid in Formula I is liberated using heterogenous palladium catalyzed de-allylation of the allyl esters. Compounds I have been found to be potent elastase inhibitors and thereby useful anti-inflammatory and antidegenerative agents.
本发明公开了一种对映体选择性合成式 I 化合物及相关化合物的工艺。该工艺包括合成
苯并呋喃基羧醛;引入
苄胺官能团并控制绝对立体
化学;制备氮杂
环丁酮片段并将其与
苯并呋喃基胺片段偶联。式 I 中的
羧酸是通过烯丙基酯的异质
钯催化去烯丙基化作用释放出来的。已发现化合物 I 是有效的弹性蛋白酶抑制剂,因此是有用的抗炎剂和抗变性剂。