γ-p-Toluenesulfonyl-α,β-epoxysilane: A New and Practical Acrolein β-Anion Equivalent
摘要:
[Graphics]Reaction of gamma-p-toluenesulfonyl-alpha,6-epoxysilane with alkyl halides and aldehydes followed by treatment with n-Bu4NF affords alpha,beta-unsaturated aldehydes via a Brook rearrangement-mediated tandem process under extremely mild conditions.
1-Benzyloxy-3-(p-tolylsulfonyl)propene as an acrolein β-anion equivalent. Synthesis of 4-substituted 2-butenolides
作者:Donald Craig、Christopher J. Etheridge、Alison M. Smith
DOI:10.1016/s0040-4039(00)60211-3
日期:1992.11
Lithiation of 1-benzyloxy-3-(p-tolylsulfonyl)propene 6 and reaction with aldehydes give alcohols 7. Sequential hydrolysis-cyclization, oxidation and DBU-mediated elimination of dine elements of p-TolSO2H gives 4-substituted 2-butenolides 10 in good overall yield.