A short and flexible route to tetrahydropyran-4-ones via conjugated nitrile oxidescycloaddition and oxa-Michael cyclization: a concise diastereoselective total synthesis of (±)-diospongin A
作者:Hongliang Yao、Jingyun Ren、Rongbiao Tong
DOI:10.1039/c2cc37772a
日期:——
flexible [3+2+1] synthetic strategy was developed for the synthesis of substituted tetrahydropyran-4-ones, featuring [3+2]-cycloaddition of alpha,beta-unsaturated nitrileoxides and alkenes and oxa-Michael cyclization in a 6-endo-trig fashion. The efficiency of this synthetic strategy was further demonstrated by the concise totalsynthesis of (+/-)-diospongin A in 8 steps with 20.2% yield.