Reversible cyclisation of ortho-blocked N-arylnitroso-imines
作者:Thomas L. Gilchrist、Michael E. Peek、Charles W. Rees
DOI:10.1039/c39750000914
日期:——
N-Aryl-C-nitroso-imines (1), in which the ortho positions of the N-aryl substituent are occupied by methyl groups, undergo rapid but reversible ring-closure to the 1,2,4-oxadiazines (3); the nitroso-imines can be intercepted in a Diels–Alder reaction with thebaine, whereas the tautomers (3) slowly dimerise.