Selective One-Pot Synthesis of Allenyl and Alkynyl Esters from β-Ketoesters
作者:Pradip Maity、Salvatore D. Lepore
DOI:10.1021/jo801563x
日期:2009.1.2
β-ketoesters to generate conjugated and deconjugated alkynyl esters and conjugated allenyl esters. This sequential one-pot method involves the formation of a vinyl triflate monoanion intermediate that leads to the selective formation of alkynes or allenes depending on additives and conditions used. Product outcomes appear to be a function of unique mono- and dianion mechanisms which are described.