Lipase-catalyzed domino Michael–aldol reaction of 2-methyl-1,3-cycloalkanedione and methyl vinyl ketone for the synthesis of bicyclic compounds
作者:Kaoru Sano、Yoshihito Kohari、Hiroto Nakano、Chigusa Seki、Mitsuhiro Takeshita、Micho Tokiwa、Yoshihiko Hirose、Koji Uwai
DOI:10.1080/00397911.2015.1116584
日期:2016.1.2
ABSTRACT Synthesis of bicyclic compounds was achieved via a lipase-catalyzed, stereoselective, domino Michael–aldol reaction of 2-methyl-1,3-cycloalkanedione and methyl vinyl ketone. Appropriate reaction conditions, including the type of enzyme, solvent, and temperature, were determined. In addition, the effects of solvent polarity and addtives were investigated. The reaction proceeded in the presence
摘要 双环化合物的合成是通过 2-甲基-1,3-环烷二酮和甲基乙烯基酮的脂肪酶催化、立体选择性、多米诺迈克尔-羟醛反应实现的。确定了合适的反应条件,包括酶的类型、溶剂和温度。此外,还研究了溶剂极性和添加剂的影响。在脂肪酶 AS 的存在下,在 20% 丙酮的二甲亚砜 (DMSO) 溶液中,在 10 °C 下反应 8 天,然后加入对甲苯磺酸 (TsOH),得到 51-83% 的双环化合物产生中等立体选择性。尽管这种多米诺迈克尔-羟醛反应仅显示出中等的立体选择性,即使反应得到了酸支持的增强,但这些结果代表了脂肪酶的潜在新应用。图形概要