Catalytic asymmetric synthesis of Japonilure and its enantiomer
摘要:
A mild, concise, and highly enantioselective (93% ee) synthesis of Japonilure and its enantiomer, Anomala osakana pheromone, is described. The key steps involve the asymmetric addition of methyl propionate to undec-2-ynal with a Zn-ProPhenol catalyst and the selective and partial reduction of the diynol ester to the cis-enol ester with Brown's P2-Ni catalyst, providing the first synthesis of the enol ester via semi-hydrogenating diynol ester. (C) 2014 Elsevier Ltd. All rights reserved.
Enantioselective synthesis of Anomala osakana pheromone and Janus integer pheromone: a flexible approach to chiral γ-butyrolactones
作者:Li Lin、Qiangyang Zhao、A-Ni Li、Fengbo Ren、Fanzhi Yang、Rui Wang
DOI:10.1039/b909418k
日期:——
The enantioselectivesynthesis of Anomala osakanapheromone and Janus integerpheromone has been achieved without using any protecting groups. The synthesis involved using an asymmetric alkynylation to obtain γ-hydroxy-α,β-acetylenicesters with high ee (84%) and yields (∼80%), followed by selective hydrogenation and lactonization in high overall yields (87% and 89%).
Catalytic asymmetric synthesis of Japonilure and its enantiomer
作者:Hao Xu、Shuo-Ning Li、Yan-Qing Yang、Yun Zhou、Qian-Zhen Yang、Qing-Hua Bian、Jiang-Chun Zhong、Min Wang
DOI:10.1016/j.tetasy.2014.09.008
日期:2014.10
A mild, concise, and highly enantioselective (93% ee) synthesis of Japonilure and its enantiomer, Anomala osakana pheromone, is described. The key steps involve the asymmetric addition of methyl propionate to undec-2-ynal with a Zn-ProPhenol catalyst and the selective and partial reduction of the diynol ester to the cis-enol ester with Brown's P2-Ni catalyst, providing the first synthesis of the enol ester via semi-hydrogenating diynol ester. (C) 2014 Elsevier Ltd. All rights reserved.