Synthesis of Substituted 3-Hydroxy-2-Furanone Derivatives via an Unusual Enolate Wittig Rearrangement/Alkylative Cyclization Sequence
作者:Renata K. Everett、John P. Wolfe
DOI:10.1021/ol4009188
日期:2013.6.21
Treatment of methyl O-(alkynylmethyl) glycolate derivatives with dialkylboron triflates and Hünig’s base leads to the formation of highly substituted 3-hydroxy-2-furanone derivatives. The transformations appear to proceed via an unusual mechanism involving initial 2,3-Wittig rearrangement of a boron ester enolate followed by an alkylative cyclization reaction that leads to incorporation of an alkyl