Synthesis of ketene (S, Te)acetals and their transformation into Z-α-phenylthio-α,β-unsaturated aldehydes
作者:Claudio C Silveira、Gelson Perin、Antonio L Braga、Miguel J Dabdoub、Raquel G Jacob
DOI:10.1016/s0040-4020(99)00389-0
日期:1999.6
phosphonates with aryl (or butyl) tellurenyl halides and aldehydes under basic conditions provides moderate to good yields of ketene thio (telluro) acetals, with vinylicsulfides being byproducts of this transformation. Tellurium-lithium exchange by reaction with n-BuLi yielded vinyl organolithium species, which were captured with several electrophiles. In the case of DMF, Z-α-phenylthio-α,β-unsaturated