1,2-Asymmetric Induction in the Zwitterionic Claisen Rearrangement of Allylamines
摘要:
A zwitterionic Claisen rearrangement has been developed for optically active N-allylpyrrolidines using a two-phase system. The inherent-1,2 asymmetric induction was investigated for the generation of a new C-C bond adjacent to a chiral C-O function. The reaction with acetyl chloride led to a small diastereomeric excess, whereas the rearrangement with propionyl chloride proceeded with a high simple and a high induced diastereoselection. The resulting gamma,delta-unsaturated amides were cyclized to the corresponding optically active gamma-butyrolactones, which are useful intermediates in natural product synthesis.
BRUCKNER, REINHARD, CHEM. BER., 122,(1989) N, C. 713-710
作者:BRUCKNER, REINHARD
DOI:——
日期:——
1,2-Asymmetric Induction in the Zwitterionic Claisen Rearrangement of Allylamines
作者:Udo Nubbemeyer
DOI:10.1021/jo00117a032
日期:1995.6
A zwitterionic Claisen rearrangement has been developed for optically active N-allylpyrrolidines using a two-phase system. The inherent-1,2 asymmetric induction was investigated for the generation of a new C-C bond adjacent to a chiral C-O function. The reaction with acetyl chloride led to a small diastereomeric excess, whereas the rearrangement with propionyl chloride proceeded with a high simple and a high induced diastereoselection. The resulting gamma,delta-unsaturated amides were cyclized to the corresponding optically active gamma-butyrolactones, which are useful intermediates in natural product synthesis.
Suzuki, Toshio; Sato, Etsuko; Kamada, Shinko, Journal of the Chemical Society. Perkin transactions I, 1986, p. 387 - 392