Iron dichloride induced isomerization or reductive cleavage of isoxazoles: A facile synthesis of 2-carboxy-azirines
摘要:
5-Alkoxy-isoxazoles and N,N-disubstituted-5-isoxazolamines were found to isomerize to azirine derivatives by the use of iron dichloride as catalyst. On the contrary 5-alkyl- and 5-aryl-isoxazoles in the presence of the same salt, undergo reductive cleavage to enaminoketones. A common reaction intermediate is proposed. (C) 1997 Elsevier Science Ltd.
Dearomative [3+2] annulation of 5-amino-isoxazoles with quinoneimineketals (QIKs) and quinonemonoacetals (QMAs) provided various indoline- or 2,3-dihydrobenzofuran-fused isoxazolines in moderate to good yields with excellent diastereoselectivities.
KANTLEHNER W.; IVANOV I. C.; MERGEN W. W.; BREDERECK H., LIEBIGS ANN. CHEM., 1980, NO 3, 372-388
作者:KANTLEHNER W.、 IVANOV I. C.、 MERGEN W. W.、 BREDERECK H.
DOI:——
日期:——
CARR J. B.; DURHAM H. G.; HASS D. K., J. MED. CHEM. <JMCM-AR>, 1977, 20, NO 7, 934-939
作者:CARR J. B.、 DURHAM H. G.、 HASS D. K.
DOI:——
日期:——
Kantlehner, Willi; Ivanov, Ivo C.; Mergen, Walter W., Liebigs Annalen der Chemie, 1980, # 3, p. 372 - 388
作者:Kantlehner, Willi、Ivanov, Ivo C.、Mergen, Walter W.、Bredereck, Hellmut
DOI:——
日期:——
Iron dichloride induced isomerization or reductive cleavage of isoxazoles: A facile synthesis of 2-carboxy-azirines
作者:Sergio Auricchio、Antonella Bini、Eros Pastormerlo、Ada M. Truscello
DOI:10.1016/s0040-4020(97)00696-0
日期:1997.8
5-Alkoxy-isoxazoles and N,N-disubstituted-5-isoxazolamines were found to isomerize to azirine derivatives by the use of iron dichloride as catalyst. On the contrary 5-alkyl- and 5-aryl-isoxazoles in the presence of the same salt, undergo reductive cleavage to enaminoketones. A common reaction intermediate is proposed. (C) 1997 Elsevier Science Ltd.