Synthetic Studies on Furanosteroids: Construction of the Viridin Core Structure <i>via</i> Diels–Alder/<i>retro-</i>Diels–Alder and Vinylogous Mukaiyama Aldol-Type Reaction
作者:Evans O. Onyango、Peter A. Jacobi
DOI:10.1021/jo301232w
日期:2012.9.7
The synthesis of the viridin class of furanosteroids core skeleton from the readily available 2,3-dihydro-4-hydroxyinden-1-one (6) is described. Our strategy was broken down into three parts: (1) Synthesis of functionalized alkyne oxazoles of type 5; (2) intramolecular Diels–Alder/retro-Diels–Alder reaction of 5 followed by tautomerization and elaboration of R to give silylated furanonaphthols 4 bearing