A Scalable Process for the Synthesis of 1,2-Dialkyldiselanes and 1-Alkaneselenols
作者:John P. Cooksey、Philip J. Kocieński、A. John Blacker
DOI:10.1021/acs.oprd.9b00380
日期:2019.11.15
telescoped process for the synthesis of 1-alkaneselenols entails (1) the rapid formation of potassium selenocyanate from potassium cyanide and selenium in methanol, (2) the nucleophilic substitution of bromoalkanes or alkyl tosylates with potassium selenocyanate, (3) the mild base-catalyzed conversion of the resultant 1-alkaneselenocyanates to 1,2-dialkyldiselanes (the Krief reaction), and (4) the reduction
合成1-链烯醇的四步伸缩方法需要(1)从甲醇中的氰化钾和硒快速形成硒氰酸钾,(2)用硒氰酸钾将溴代烷烃或烷基甲苯磺酸盐进行亲核取代,(3)所得的1-链烯硒酸酯的温和碱催化转化为1,2-二烷基二烯酮(Krief反应),和(4)用次磷酸还原所得的1,2-二烷基二烯酮,得到所需的1-链烯基烯醇。该方法已被用于生产10.4摩尔规模的1-辛烯酚。描述了该过程的九个示例。