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Investigation of 4H-3,1-benzoxazines

✍ Scribed by E. V. Gromachevskaya; T. P. Kosulina; F. V. Kvitkovskii; V. G. Kul'nevich

Book ID: 105528594
Publisher: Springer US
Year: 1997
Tongue: English
Weight: 275 KB
Volume: 33
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf02291810

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## Treatment of the hydrochloride salts of 4-chloro-5-(2halomethylaryl-imino)-5H-l,2,3-dithiazoles (2) with sodium cyanoborohydride in THF at room temperature gave 2-cyan0-4H-3,l -benzothiazines ( I ) in good to moderate yields. 2-Cyano-4H-3,l -benzoxazines (4) were obtained in good to moderate yiel