Monatshefte fur Chemie p. 704 - 708 (1970)
Update date:2022-07-29
Topics:
Balaban
Zugravescu
Avramovici
Silhan
Earlier tentatively assigned structures for trans-chalcone oxime, semicarbazone and thiosemicarbazone, resp., have been corrected by means of NMR spectra: open-chain structures have been found for the title compounds formed in the acid catalyzed reaction, whereas basic catalysts lead to intramolecular cyclization with formation of 3,5-diphenyl-2-isoxazoline and 1-substituted 3,5-diphenyl-2-pyrazolines resp. Assignments in the NMR spectra were made by comparison with those from authentic samples of trans-dypnone and its semicarbazone.
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Doi:10.1016/0040-4020(72)88042-6
(1972)Doi:10.1021/jm015588e
(2002)Doi:10.1039/b009664b
(2001)Doi:10.1021/jm00272a001
(1972)Doi:10.1021/ja01877a069
(1939)Doi:10.1023/A:1013135722293
(2001)