Tautomerism of 3-alkoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline derivatives
作者:D. D. Chapman
DOI:10.1039/j39660000806
日期:——
The compound previously formulated as ethyl 1,2-dihydro-2-oxoquinoxalin-3-ylacetate has the isomeric structure 3-ethoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline in the solid state. In solution the 1-methyl derivative has been shown by nuclear magnetic resonance studies to exist as a tautomeric mixture of unsaturated and saturated esters.
先前配制为1,2-二氢-2-氧代喹喔啉-3-基乙酸乙酯的化合物具有固态的3-乙氧基羰基亚甲基-2-氧代1,2,3,4-四氢喹喔啉的异构体结构。在溶液中,通过核磁共振研究表明1-甲基衍生物以不饱和和饱和酯的互变异构混合物形式存在。