Efficient formal synthesis of the dendrobatid alkaloid, indolizidine (−)-209B
摘要:
Condensation of the beta-amino alcohol 7 derived from an enantiopure beta-amino ester with the beta-keto ester 8 provides the vinylogous urethane 9, which is cyclized to give the dehydropiperidine 10. Hydrogenation of 10 and subsequent cyclization mediated by Ph3P/CBr4 then afforded the bicyclic product 12, a precursor of indolizidine (-)-209B. (C) 2002 Elsevier Science Ltd. All rights reserved.
Efficient formal synthesis of the dendrobatid alkaloid, indolizidine (−)-209B
摘要:
Condensation of the beta-amino alcohol 7 derived from an enantiopure beta-amino ester with the beta-keto ester 8 provides the vinylogous urethane 9, which is cyclized to give the dehydropiperidine 10. Hydrogenation of 10 and subsequent cyclization mediated by Ph3P/CBr4 then afforded the bicyclic product 12, a precursor of indolizidine (-)-209B. (C) 2002 Elsevier Science Ltd. All rights reserved.
Efficient formal synthesis of the dendrobatid alkaloid, indolizidine (−)-209B
作者:Dawei Ma、Xiaotao Pu、Jinyi Wang
DOI:10.1016/s0957-4166(02)00577-3
日期:2002.10
Condensation of the beta-amino alcohol 7 derived from an enantiopure beta-amino ester with the beta-keto ester 8 provides the vinylogous urethane 9, which is cyclized to give the dehydropiperidine 10. Hydrogenation of 10 and subsequent cyclization mediated by Ph3P/CBr4 then afforded the bicyclic product 12, a precursor of indolizidine (-)-209B. (C) 2002 Elsevier Science Ltd. All rights reserved.