Generation of azomethine imines via opening of the diaziridine ring in unsymmetrically substituted 6-aryl-1,5-diazabicyclo-[3.1.0]hexanes and their transformations
作者:Yu. B. Koptelov、S. P. Saik、A. P. Molchanov、S. I. Selivanov
DOI:10.1134/s1070428011030171
日期:2011.3
Thermally induced opening of the diaziridine ring at the carbon-nitrogen bond in unsymmetrically substituted 6-aryl-1,5-diazabicyclo[3.1.0]hexanes is characterized by low regioselectivity which is likely to be determined by the inductive effect of substituents in the trimethylene bridge. 1,3-Dipolar cycloaddition of the resulting azomethine imines to phenyl isocyanate is regioselective: it occurs at
在不对称取代的6-芳基-1,5-二氮杂双环[3.1.0]己烷中,碳氮键上的热诱导的二氮丙啶环开环反应,其特征在于区域选择性低,这可能是由取代基的诱导作用决定的。三亚甲基桥。所形成的偶氮甲亚胺与异氰酸苯酯的1,3-偶极环加成是区域选择性的:它发生在双碳-氮键上,主要是由于在Z偶氮甲亚胺的空间上受阻较弱的一侧通过偶极亲和法形成了相应的顺式加合物。在与N-芳基马来酰亚胺的反应中也观察到了类似的双亲亲油性方法。