作者:Somnath S. Chandankar、Sadagopan Raghavan
DOI:10.1021/acs.joc.9b01248
日期:2019.8.2
Two stereoselective routes to the C7–C22 subunit of amphidinolide K are disclosed. Jacobsen’s hydrolytic kinetic resolution and Sharpless’ asymmetric dihydroxylation reactions have been employed for the construction of the tetrahydrofuran ring. The C10–C11, C16–C17, C9–O, and C18–O bonds have been created using α-chloro sulfide intermediates and [2,3] sigmatropic rearrangement. Marshall’s propargylation
公开了两种通往两性霉素K的C7-C22亚基的立体选择途径。Jacobsen的水解动力学拆分和Sharpless的不对称二羟基化反应已用于构建四氢呋喃环。C10–C11,C16–C17,C9–O和C18–O键是使用α-氯硫化物中间体和[2,3]σ重排而创建的。利用Marshall的炔丙基化方案创建了C4立体异构中心,区域选择性加氢锆/碘淬灭提供了一个烯基碘化物,该烯基碘化物被用于NHK与C7–C22亚基的偶联。Oxonia-Cope重排导致创建C18甲醇立体异构中心和链延长。