Action of diazomethane on (Z/E)-2-methyl (or phenyl)-4-benzylidene-5 (4H)-oxazolones

C Cativiela, MD Diaz de Villegas…

Index: Cativiela, Carlos; Diaz de Villegas, Maria D.; Mayoral, Jose A.; Melendez, Enrique Journal of Organic Chemistry, 1984 , vol. 49, # 8 p. 1436 - 1439

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Citation Number: 17

Abstract

diazomethane. 12 and 22 were easily obtained by standard procedures5 from benzaldehyde and the corresponding aceturic or hippuric acid, and 1E was prepared by isomerization of 12 with hydrobromic acid. The addition of diazomethane to double bonds activated by a suitable electron-withdrawing group, followed by thermal decomposition of the resulting pyrazolines, is an established route to cyclopropanes," although the synthetic ...