Heterocycles Synthesis Based on Arylation Products of Unsaturated Compounds: XII. Reactions of 2-Aryl-1,4-benzoquinones with Dithiol Compounds
作者:N. D. Obushak、R. L. Martyak、V. S. Matiichuk
DOI:10.1007/s11178-005-0238-3
日期:2005.5
Reactions of 2-aryl-1,4-benzoquinones with disodium (2,2-dicyano-1,1-ethylene)dithiolate gave rise either to 1,3-benzodithiol or 1,3-benzoxathiol depending on the character of the aryl substituent. 2-Aryl-1,4-benzoquinones reacted with 3-methylsulfanyl-3-sulfanyl-2-cyanoacrylamide with a higher selectivity: 2-(7-Aryl-5-hydroxy-1,3-benzoxathiol-2-ylidene)-2-cyanoacetamides were obtained in a high yield.
2-cyano-3-mercapto-3-(methyl-thio)acrylamide (1) with benzoic acid in the presence of polyphosphate ester gave 5-carbomoyl-4-methylthio-2-phenyl-1,3-thiazin-6-one (5); the structures of (5) and its 2,3-dihydro-derivative (6) were determined by single-crystal X-ray diffraction.