Concise formal synthesis of (−)-7-deoxyloganin via N-heterocyclic carbene catalysed rearrangement of α,β-unsaturated enol esters
作者:Lisa Candish、David W. Lupton
DOI:10.1039/c1ob05953j
日期:——
NHC catalysedrearrangement of α,β-unsaturated enol esters derived from formyl acetates and cyclopentyl annulated α,β-unsaturated acids provides the cyclopentapyranone core of (−)-7-deoxyloganin (1) with diastereo- and chemoselectivity in 6 steps starting from (−)-citronellal. The elaboration to the natural product has been investigated using two new approaches. The most successful intercepts our previous