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Synthesis of 4H-1,3-benzoxazin-4-onium salts and 4-H-1,3-benzoxazin-4-ones

✍ Scribed by Yu. I. Ryabukhin; V. V. Mezheritskii; G. N. Dorofeenko

Book ID: 112345498
Publisher: Springer US
Year: 1975
Tongue: English
Weight: 306 KB
Volume: 11
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf00502422

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## Abstract Substituted 2‐(benzylamino)‐2__H__‐1,4‐benzoxazin‐3(4__H__)‐ones are unstable under alkaline and acidic conditions, undergoing opening of the benzoxazinone ring. 2‐Bromo‐2__H__‐1,4‐benzoxazin‐3(4__H__)‐ones show similar degradation under alkaline conditions, while replacement of Br at C

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