Organocatalytic Enantioselective Decarboxylative Michael Addition of β-Keto Acids to Dicyanoolefins and Disulfonylolefins
作者:Yi Wei、Ran Guo、Yanfeng Dang、Jing Nie、Jun-An Ma
DOI:10.1002/adsc.201600485
日期:2016.9.1
A convenient organocatalytic enantioselective decarboxylative Michael addition of β‐keto acids to dicyanoolefins and disulfonylolefins is realized. In the presence of saccharide‐derived chiral amino thioureas, the reaction proceeded smoothly to afford a wide range of the Michael adducts in 62–99% yield with 70–94% ee. Moreover, one of the chiral adducts obtained could be readily converted into the
实现了将β-酮酸方便地有机催化对映选择性脱羧迈克尔加成到二氰基烯烃和二磺酰基烯烃中。在糖衍生的手性氨基硫脲的存在下,反应顺利进行,以62-99%的收率和70-94%ee的收率提供了多种迈克尔加合物。此外,所获得的手性加合物之一可以容易地在四个步骤中以85%ee转化为单氟化产物,总产率为68%。