作者:Ferenc Fülöp§、Jorma Mattinen、Kalevi Pihlaja
DOI:10.1016/s0040-4020(01)96019-3
日期:1990.1
NMR spectroscopy was applied to study ring-chain tautomeric equilibria in several substituted 1,3-thiazolidines. The system highly prefers the ring form and only in the case of 2-(2'-hydroxy,5'-bromophenyl)-l,3-benzothiazo-line (2d) 1H and 13C NMR spectra revealed a detectable amount of the openchain tautomer. The relative stability of the 1,3-thiazolidine ring was estimated to be more than 104 times
NMR光谱用于研究几种取代的1,3-噻唑烷中的环链互变异构平衡。该系统高度偏爱的环形式并且仅在2-(2-的情况下“ -羟基,5 ”溴苯基)-1,3-苯并噻唑线(2D)1 H和13 C NMR光谱显示的可检测量的开链互变异构体。1,3-噻唑烷环的相对稳定性估计比1,3-恶唑烷环的相对稳定性高10 4倍以上。