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Synthesis of 1- and 4-substituted-5H-benzo[a]phenoxazin-5-ones

✍ Scribed by Hitoshi Hayakawa; Seiko Nan'ya; Tetsuo Yamamoto; Eturô Maekawa; Yoshio Ueno

Book ID: 112128419
Publisher: Journal of Heterocyclic Chemistry
Year: 1986
Tongue: English
Weight: 278 KB
Volume: 23
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570230627

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## Abstract magnified image Reactions of 3‐chlorobenzo[__b__]thiophene‐2‐carbonyl chloride with 2‐alkyl‐2‐aminopropanamides have been used to prepare a series of carboxamides **1a‐d** (yields 61‐85%). The products were submitted to base‐catalysed ring closure reactions to give the corresponding 4,