Catalytic Enantioselective Allylic Amination of Unactivated Terminal Olefins via an Ene Reaction/[2,3]-Rearrangement
作者:Hongli Bao、Uttam K. Tambar
DOI:10.1021/ja307851b
日期:2012.11.14
The enantioselective allylic amination of unactivated terminal olefins represents a direct and attractive strategy for the synthesis of enantioenriched amines. We have developed the first use of a nitrogen-containing reagent and a chiral palladium catalyst to convert unfunctionalized olefins into enantioenriched allylic amines via an ene reaction/[2,3]-rearrangement.
of the pyrrolidine ring, and then the N,O-acetal is further oxidized by the o-benzoquinone to the γ-lactam. Because the first oxidation occurs selectively at the α-C–H of the pyrrolidine ring, oxidation-sensitive functional groups (allyl-, vinyl-, hydroxyl-, and amino groups) on pyrrolidine ring are unaffected. The synthetic utility of this novel method was demonstrated by the facile syntheses of (S)-vigabatrin
Scalable Synthesis of Both Enantiomers of Vigabatrin, an Antiepileptic Drug
作者:Gorakhnath R. Jachak、D. Srinivasa Reddy
DOI:10.1002/ejoc.201801617
日期:2019.2.14
A scalable synthesis of bothenantiomers of vigabatrin, a potent inhibitor of gamma‐aminobutyric acid (GABA) catabolism used for the treatment of epilepsy, is presented. Wittig olefination and pyrolytic elimination are the key steps. The target compounds are obtained with >98 % enantiopurity.