Total synthesis of cryptomoscatones D1 and D2: stereochemical assignment of cryptomoscatone D1
作者:Luiz Fernando Toneto Novaes、Roberta Lopes Drekener、Carolina Martins Avila、Ronaldo Aloise Pilli
DOI:10.1016/j.tet.2014.07.025
日期:2014.9
The first total synthesis and structural elucidation of cryptomoscatone D1, and a novel synthetic approach for cryptomoscatone D2 were achieved in 30% and 29% overall yield, respectively. The synthesis relied on the use of a key Mukaiyama aldol reaction followed by a diastereoselective carbonyl reduction that allowed the preparation of four cryptomoscatone isomers in a stereochemically divergent manner
隐莫卡酮D1的首次总合成和结构阐明,以及隐莫卡酮D2的新颖合成方法,分别实现了30%和29%的总产率。该合成依赖于使用关键的Mukaiyama aldol反应,然后进行非对映选择性羰基还原,从而可以立体化学发散的方式制备四个隐莫司卡酮异构体。合成立体异构体和天然产物的NMR数据和CD曲线的比较证实了隐莫司酮D2的立体化学性质,并导致建立了隐莫司酮D1的绝对构型。