Substituted lithium (E)-3-lithio-3-tosyl-2-propenolates: useful intermediates in organic synthesis
作者:Carmen Najera、Miguel Yus
DOI:10.1021/jo00268a004
日期:1989.3
Dilithiated (E)-N-isopropyl-3-tosylacrylamide: a new β-acylvinyl anion equivalent in organic synthesis
作者:Carmen Nájera、Miguel Yus
DOI:10.1039/p19890001387
日期:——
The dilithiated anion (6) obtained by reaction of (E)-N-isopropyl-3-tosylacrylamide with 2 equiv. of methyl-lithium at –78 °C is a new and efficient β-acylvinyl anionequivalent useful in the synthesis of substituted 3-tosyl-α,β-butenolides (8) by reaction with aldehydes followed by treatment with hydrochloric acid. In the absence of acid the process leads to the γ-hydroxy amide derivatives (7), which