Studies on isoxazoles. XIII. Synthesis and chemical properties of 3-mercaptoisoxazoles.
作者:SOJI SUGAI、KAZUO TOMITA
DOI:10.1248/cpb.28.552
日期:——
3-Mercaptoisoxazoles (XI) were synthesized from 3-allylsulfinylisoxazoles (II). The reaction of II with triphenylphosphine in the presence of acetic anhydride gave the corresponding 3-acetylthioisoxazoles (VII). The thioacetates (VII) were converted into 3-mercaptoisoxazoles (XI) by reaction with silver nitrate and subsequent treatment of the resulting silver salts (X) with hydrogen sulfide. The thiols (XI) were oxidized in air to give the corresponding disulfides (XIV). In alkaline solution, 3-mercapto-5-phenylisoxazole (XIb) was decomposed into benzoylacetonitrile (IX) and sulfur.
3-巯基异噁唑(XI)是由3-烯丙基亚磺酰基
异噁唑(II)合成的。将II与三苯基
磷在
醋酸酐存在下反应生成相应的3-乙酰
硫异噁唑(VII)。将
硫乙酸酯(VII)与
硝酸银反应,随后用
硫化氢处理生成相应的
银盐(X),进一步转化为
3-巯基异噁唑(XI)。巯基(XI)在空气中氧化,生成相应的二
硫化物(XIV)。在碱性溶液中,3-巯基-
5-苯基异噁唑(XIb)分解为
苯甲酰乙腈(IX)和
硫。