Chemoselective introduction of acetylene into hindered carbonyl group using alkynyltrifluoroborate, a solution as one step to (−)-tetrodotoxin
作者:Noboru Yamamoto、Minoru Isobe
DOI:10.1016/s0040-4020(01)81827-5
日期:1993.7
Optically active cyclohexane moiety precursor for tetrodotoxin molecule was synthesized by Diels-Alder cycloaddition between a bromo derivative of levoglucosenone and Danishefsky type diene. The unstable product, bromo-ketone, was converted into vinylphosphinate and then the carbonyl compounds, to which the critical carbon nucleophile was predominantly introduced with alkynyltrifluroborate. The Lewis