Influence des substituants sur la tautomerie cycle-chaine en serie hydroxy-5 isoxazoline-2
作者:R. Escale、R. Jacquier、B. Ly、F. Petrus、J. Verducci
DOI:10.1016/0040-4020(76)85012-0
日期:1976.1
The ring-chain tautomerism of 5-hydroxy-2-isoxazolines has been investigated. By increasing bulk and/or number of substituents, the ring tautomer is generally favoured due to conformational factors in the chain tautomer. Introduction of two methyl groups at position 4 produces an exaltation of this effect (gem-dimethyl effect). The 5-substituent has also a steric and electronic influence on the reactivity
已经研究了5-羟基-2-异恶唑啉的环链互变异构现象。通过增加取代基的体积和/或数量,由于链互变异构体中的构象因素,通常优选环互变异构体。在位置4处引入两个甲基产生了这种作用的提高(宝石-二甲基作用)。5-取代基还对链羰基的反应性具有空间和电子影响。