Correlation between p<i>K</i><sub>a</sub> and Reactivity of Quinuclidine-Based Catalysts in the Baylis−Hillman Reaction: Discovery of Quinuclidine as Optimum Catalyst Leading to Substantial Enhancement of Scope
作者:Varinder K. Aggarwal、Ingo Emme、Sarah Y. Fulford
DOI:10.1021/jo026671s
日期:2003.2.1
powerful combination of quinuclidine with methanol was tested with a host of aldehydes and Michaelacceptors. Not only were the reactions more efficient and faster than previously reported, but now new substrates that were previously unreactive could be employed. Notable examples include the use of acetylenic aldehydes and the employment of vinyl sulfones, acrylamides, delta-lactones, and even alpha