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Cycloaddition of a 1,4 dipole with alkyl ketones. Novel synthesis of 1,3,4-tetrahydrooxadiazines

✍ Scribed by Butler, George Bergen; Turner, S. Richard; Guilbault, Lawrence J.

Book ID: 127099622
Publisher: American Chemical Society
Year: 1971
Tongue: English
Weight: 422 KB
Volume: 36
Category: Article
ISSN: 0022-3263
DOI: 10.1021/jo00818a024

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## Abstract The reaction of the 2‐(1‐alkylhydrazino)‐6‐chloroquinoxaline 4‐oxides **1a,b** with diethyl acetone‐dicarboxylate or 1,3‐cyclohexanedione gave ethyl 1‐alkyl‐7‐chloro‐3‐ethoxycarbonylmethylene‐1,5‐dihydropyridazino[3,4‐__b__]quinoxaline‐3‐carboxylates **5a,b** or 6‐alkyl‐10‐chloro‐1‐oxo‐