脱氢松香胺-辛可宁-方酰胺催化的2，4-戊二酮对硝基烯的不对称迈克加成反应

In this paper, on the basis of the special activity of natural rosin derivatives and the good asymmetric induction activity of squaramide organic catalysts, a novel dehydroabietylamine-cinchonine-squaramide catalyst has been developed for asymmetric Michael addition of 2,4-pentanedione to nitroalkenes. It found that with using 5 mol% dehydroabietylamine-cinchonine-squaramide catalyst , the reaction of 2,4-pentanedione to nitroalkenes could act effectively, and a series of nitroalkene derivatives possessing optical activity were afforded with high reaction yields and excellent enantioselectivities (up to 99% yield, 89% ee).