Reactions of ortho oxy-substituted benzyl and phenacyl bromides in dimethyl sulphoxide
作者:J.A. Donnelly、P.A. Kerr、P. O'Boyle
DOI:10.1016/0040-4020(73)80223-6
日期:1973.1
bromides and tosylates oxidatively rearrange in moist dimethyl sulphoxide to o-hydroxybenzyl esters; o-acetoxy- and o-benzoyloxy- phenacyl bromides rearrange to mixtures of 2-hydroxycoumaran-3-ones and o-hydroxyphenacyl esters; o-hydroxyphenacyl bromides also yield 2-hydroxycoumaran-3-ones, together with o-hydroxyphenacyl alcohols. 2-Acetoxybenzaldehyde is reductively rearranged by sodium borohydride to o-hydroxybenzyl
邻乙酰氧基和邻苯甲酰氧基苄基溴,在潮湿的二甲基亚砜中氧化甲苯磺酸化重排成邻羟基苄基酯;邻-乙酰氧基-和邻-苯甲酰氧基-苯甲酰溴重排成2-羟基香豆素-3-酮和邻-羟基苯甲酸酯的混合物;邻羟基苯甲酰溴还与邻羟基苯甲酰醇一起生成2-羟基香豆兰-3-酮。2-乙酰氧基苯甲醛被硼氢化钠还原性重排为乙酸邻羟基苄基酯。