Mechanism of the pinacol–pinacolone rearrangement of 2,3-di-(3-pyridyl)-2,3-butanediol in sulfuric acid
作者:Eric Loeser、Guang-Pei Chen、Tao He、Kapa Prasad、Oljan Repič
DOI:10.1016/s0040-4039(02)00243-5
日期:2002.3
The reaction of 2,3-di-(3-pyridyl)-2,3-butanediol (1) in H2SO4 was studied. It was found that the meso and racemic forms give mono- and bis-SO3 addition products, which rearrange to a ketone (Metopirone®) and two other major by-products. The formation of SO3 addition products and a marked increase in reaction rates with greater amount of SO3 suggest an alternate mechanism involving sulfonyloxy leaving
研究了2,3-二-(3-吡啶基)-2,3-丁二醇(1)在H 2 SO 4中的反应。发现内消旋和外消旋形式产生单-和双-SO 3加成产物,其重排成酮(Metopirone®)和另外两种主要副产物。SO 3加成产物的形成和反应速率的显着增加以及大量SO 3的出现提示了涉及磺酰氧基离去基团的另一种机理。