Alumina promoted cyclization of α-nitro-oximes: a new entry to the synthesis of 1,2,5-oxadiazoles N-oxides (furoxans)
摘要:
A convenient method for the synthesis of 1,2,5-oxadiazole-N-oxides (furoxans) from alpha -nitro-ketoximes using acidic alumina as catalyst is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Furazan N-oxides: a convenient source of both nitrile oxides and isocyanates
作者:J. A. Chapman、J. Crosby、C. A. Cummings、R. A. C. Rennie、R. Michael Paton
DOI:10.1039/c39760000240
日期:——
Thermolysis of furazan N-oxides results in ring cleavage to nitrile oxides which may be trapped in good yield as 1,3-dipolar cycloadducts; in the absence of dipolarophiles the intermediate nitrile oxides rearrange to isocyanates.