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The reactions of 4-substituted-7-aminothieno-[3,4-d]pyridazines and 2-methyl-6-aminothienopyridine-5-thione with electron-poor olefins and acetylenes

✍ Scribed by A. M. Hussein; A. A. Atalla; I. S. Abdel-Hafez; M. H. Elnagdi

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 163 KB
Volume: 8
Category: Article
ISSN: 1042-7163
DOI: 10.1002/(sici)1098-1071(1997)8:1<29::aid-hc4>3.0.co;2-y

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✦ Synopsis

Cycloadditions of thienopyridazines and a thienopyridine with electron-poor olefins and acetylenes as dienophiles are described. The nonisolable adducts undergo subsequent loss of hydrogen sulfide to give substituted phthalazines and substituted isoquinolines, respectively. ᭧ 1997 John Wiley & Sons, Inc.

Discussion

Benzoazines are very interesting as potential agrochemicals [1-3] and as pharmaceuticals [4-8]. Some of our studies have been aimed at developing simple and efficient syntheses of polyfunctional heteroaromatics from readily obtainable starting materials [9-Dedicated to Professor Louis D.

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