Vinylic organoboranes. 4. A general, one-pot synthesis of 6- and 7-alkyn-1-ols via boracyclanes. Influence of steric effects in the iodination of lithium alkynyl ate complexes of dialkylborinates
作者:Herbert C. Brown、D. Basavaiah、N. G. Bhat
DOI:10.1021/jo00374a005
日期:1986.11
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%).