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Regioselective addtion of 5-amino-3-benzylthio-1,2,4-triazole and its analogues with aryl isocyanates

✍ Scribed by Rong-Jian Lu; Bao-Ying Qian; Hai-Yan Deng; Hua-Zheng Yang

Book ID: 102097568
Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 380 KB
Volume: 15
Category: Article
ISSN: 0256-7660
DOI: 10.1002/cjoc.19970150608

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✦ Synopsis

The orientation of the addition of 5 -a m i n ~~b e n c y l t h i o -l , 2 , e t r i ~l e and ita analogues (pyr-le) (1) with the aryl ir0cylrnat.s can be directed by controlling the reaction temperrtun and one of the product, bamino-l-srylsminocarbonyl-3-bentylthi~l,2,~triesole (pynmle) (a), can rearrange at 17OOC to another product, 5-arylursylena3.be~lt~o-l,2,.4-trireole (pyresole) (S). A plausible mechanbm exphatbn for thh rearrangement resction wa8 presented. It wan rugge~ted that the rearrangement reaction could be rrlvted,to the thermodynamia tramposition leading to the predominant 5 a r y l u n y k n c -3 -b e n c y l t ~l , 2 , . 4 -t r i ~~ energy preferentially.

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## Abstract For Abstract see ChemInform Abstract in Full Text.

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