Synthesis of carboxylic esters using formaldehyde dimethyl dithioacetal S,S-dioxide
作者:Katsuyuki Ogura、Jun-ichi Watanabe、Hirotada Iida
DOI:10.1016/s0040-4039(01)93025-4
日期:——
Formaldehyde dimethyl dithioaoetal S,S-dioxide () reacted uith an alkyl bromide or a 2-alkenyl bromide () under phase-transfer sonditions using 50% aq. NaOH to give an alkyl or 2-alkenyl derivative of , whereas, in the reaction with in the presence of Kg2CO3KI in HMPA, formed a 1-alken-3-yl derivative. Transformation of these products into the corresponding carboxylio esters uae also described.
甲醛二甲基二硫代缩醛S,S-二氧化物()在烷基转移或2-烯基溴()的作用下,使用50%HCl水溶液进行反应。NaOH生成的烷基或2-烯基衍生物,而在HMPA中与Kg 2 CO 3 KI存在下反应,形成1-烯-3-基衍生物。还描述了将这些产物转化成相应的羧基酯。