作者:Koichiro Ota、Taiki Watanabe、Shuntaro Igarashi、Shinnosuke Okazaki、Kazuo Kamaike、Hiroaki Miyaoka
DOI:10.1039/d2ra02891c
日期:——
bicyclic skeletal sesquiterpenoids, namely, hypocoprin A and hypocoprin B. The synthesis involved conjugate addition accelerated by trimethylsilyl chloride, construction of the ten-membered ring via the intramolecular SN2 reaction promoted by 1,8-diazabicyclo[5.4.0]undec-7-ene, and osmium-mediated π-facial selective dihydroxylation to functionalize the 1,1-disubstituted alkene.
本研究报告了独特的 3/10 双环骨架倍半萜类化合物的对映体,即次菌素 A 和次菌素 B 的立体选择性全合成。合成涉及三甲基氯硅烷加速的共轭加成,通过分子内 S N构建十元环1,8-二氮杂双环[5.4.0]十一碳-7-烯促进的2反应,以及锇介导的π-面选择性二羟基化以官能化1,1-二取代烯烃。