Nitrosation of salts of 1-hydroxyimino-2,2-dinitro-1-R-ethanes, a novel method for the preparation of isomeric 3(4)-nitro-4(3)-R-furoxans
作者:I. V. Ovchinnikov、A. O. Finogenov、M. A. Epishina、A. S. Kulikov、Yu. A. Strelenko、N. N. Makhova
DOI:10.1007/s11172-009-0292-z
日期:2009.10
A novel general method for the synthesis of isomeric 3(4)-nitro-4(3)-R-furoxans is developed. 3-Nitro isomers were obtained by reaction of hydroximoylchlorides with dinitromethane sodium salt followed by conversion of the resulting 1-substituted 1-hydroxyimino-2,2-dinitroethanes into dipotassium (or disodium salts) and their subsequent nitrosation with NaNO2 in AcOH or with N2O4. Thermal isomerization