✦ LIBER ✦

A new convenient method for the synthesis of 2H-1,4-benzoxazine derivatives from nitroketones via intramolecular reductive cyclization

✍ Scribed by Meyoung Ju Joung; Jin Hee Ahn; Hoe Moon Kim; Nung Min Yoon; Kee Won Kim; Jae Hoon Kang; Seok Joon Lee

Publisher: Journal of Heterocyclic Chemistry
Year: 2002
Tongue: English
Weight: 56 KB
Volume: 39
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570390534

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Dedicated to Professor Herbert C. Brown on the occasion of his 90^th^ birthday.

Potentially bioactive 2__H__‐1,4‐benzoxazine derivatives could be conveniently prepared in one step from the corresponding nitroketones using 10% palladium on carbon with triethylamine in the presence of hydrogen (Pd/C‐TEA‐H~2~) system. Several other tertiary amines such as nicotine, pyridine, and quinoline also could be used, but TEA gave the best results.

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