SULFENOCYCLIZATION OF UNSATURATED UREAS AND THIOUREAS

Faculty	Pharmacy	Year:	1995
Type of Publication:	Article	Pages:	609-614
Authors:	ElSamii, ZKA
Journal:	MONATSHEFTE FUR CHEMIE SPRINGER-VERLAG WIEN	Volume:	126
Research Area:	Chemistry	ISSN	ISI:A1995QZ09000015
Keywords :	SULFENOCYCLIZATION, 2-OXAZOLINE, 2-THIAZOLINE, 5, 6-DIHYDRO-1, 3-OXAZINE, 5, 6-DIHYDRO-1, 3-THIAZINE
Abstract:	A general method for the formation of cyclic sulfenylated 2-oxazoline, 2-thiazolines, 5,6-dihydro-4H-1,3-oxazines, and 5,6-dihydro-4H-1,3-thiazines is described. The procedure employs arylsulfenyl chloride and ethyldiisopropylamine to generate an episulfonium ion intermediate from which the cyclic products arise by internal nucleophilic displacement.
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