Catalytic Regioselective γ-Methylenation of α,β-Unsaturated Aldehydes Using Formaldehyde via Vinylogous Aldol Condensation
作者:Mahesh S. Kutwal、Sachin Dev、Chandrakumar Appayee
DOI:10.1021/acs.orglett.8b04110
日期:2019.4.19
first vinylogous aldol condensation of α,β-unsaturated aldehydes using aqueous formaldehyde is developed under mild reaction conditions to form the γ-methylenated products with excellent regioselectivity. Using this methodology, a short synthesis of α-triticene, an antifungal compound, is achieved in two steps. The practicality of this methodology is demonstrated by the gram-scale synthesis. Formation of
在温和的反应条件下,使用甲醛水溶液进行的α,β-不饱和醛的首个乙烯基醇醛缩合反应,形成了具有良好区域选择性的γ-甲基化产物。使用这种方法,可以在两个步骤中完成抗真菌化合物α-三苯甲基的短合成。这种方法的实用性由克级综合证明。还描述了由巴豆醛形成的不寻常的双γ-官能化产物和由苯乙二醛形成的直接不对称乙烯基醇醛醇产物。