Pilocarpine (1) was synthesized in seven steps starting from 2-acetylbutyrolactone. Chirality was introduced by asymmetric reduction of enone 4 and transferred via a Claisen rearrangement. A mild procedure for the preparation of 1,5-disubstituted imidazoles in the last synthetic operation led to pilocarpine unaccompanied by isopilocarpine.
作者:David A. Horne、Burkhard Fugmann、Kenichi Yakushijin、George Buchi
DOI:10.1021/jo00053a016
日期:1993.1
Pilocarpine (1) was synthesized in seven steps starting from 2-acetylbutyrolactone. Chirality was introduced by asymmetric reduction of enone 4 and transferred via a Claisen rearrangement. A mild procedure for the preparation of 1,5-disubstituted imidazoles in the last synthetic operation led to pilocarpine unaccompanied by isopilocarpine.
Preparation and Diels-Alder reactions of 1,1-dicarbonylalkenes
作者:Thomas R. Hoye、Andrew J. Caruso、Andrew S. Magee