作者:Ronald Grigg、Sunit Thianpatanagul、James Kemp
DOI:10.1016/s0040-4020(01)86100-7
日期:1988.1
Pyridoxal imines of ∞-amino acid esters and related amines undergo cycloaddition to N-phenylmaleimide on heating in acetonitrile, toluene or xylene. The cyclo-additions proceed in good yield, are stereospecific, and involve an endo-transition state. The reactive intermediates are postulated to be NH azomethine ylides produced stereospecifically from the imines by prototropy.
在乙腈,甲苯或二甲苯中加热时,∞-氨基酸酯和相关胺的乙二醛亚胺会与N-苯基马来酰亚胺发生环加成反应。环加成以良好的产率进行,具有立体定向性,并涉及内过渡态。假定反应性中间体是通过原生质体从亚胺立体定向产生的NH甲亚胺基亚胺。