Reaction of 2-(4-methoxyphenyl)-4-phenyl-5(4H)-oxazolone (1) with hydrazonoyl chlorides 2 under phase transfer conditions afforded 1,4-diaryl-4-(4-methoxybenzamido)-5(1H)-pyrazolone-3-carboxylic acid alkylesters 3 as the main products. Besides ethanedioic acid monoesters 2-aryl-2-(2,4-diaryl-oxazol-5-yl) hydrazides 4 and 4,4′-bis-(1,2,4-triaryl-5(1H)-imidazolones) 5 were obtained.
Oxazolones; part III. Reaction of 5(4H)-oxazolones with hydrazonoyl halides: A new synthesis of 5-pyrazolones / F. Clerici, R. Destro, E. Erba, M.L. Gelmi, D. Pocar. - In: HETEROCYCLES. - ISSN 0385-5414. - 27:6(1988), pp. 1411-1419. [10.3987/COM-88-4492]
Oxazolones; part III. Reaction of 5(4H)-oxazolones with hydrazonoyl halides: A new synthesis of 5-pyrazolones
F. ClericiPrimo
;R. DestroSecondo
;E. Erba;M.L. GelmiPenultimo
;D. PocarUltimo
1988
Abstract
Reaction of 2-(4-methoxyphenyl)-4-phenyl-5(4H)-oxazolone (1) with hydrazonoyl chlorides 2 under phase transfer conditions afforded 1,4-diaryl-4-(4-methoxybenzamido)-5(1H)-pyrazolone-3-carboxylic acid alkylesters 3 as the main products. Besides ethanedioic acid monoesters 2-aryl-2-(2,4-diaryl-oxazol-5-yl) hydrazides 4 and 4,4′-bis-(1,2,4-triaryl-5(1H)-imidazolones) 5 were obtained.
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