[reaction: see text] Dicobalt octacarbonyl [Co(2)(CO)(8)] in acetonitrile at 75 degrees C triggers the cleavage of the N-O bond of 4-isoxazolines (1) to bring about the valence rearrangement to 2-acylaziridines (2). The isoxazolines were stable at 75 degrees C in the absence of the cobalt complex.
Reduction of 2,3-Dihydroisoxazoles to β-Amino Ketones and β-Amino Alcohols
作者:Patrick Aschwanden、Lisbet Kværnø、Roger W. Geisser、Florian Kleinbeck、Erick M. Carreira
DOI:10.1021/ol052540c
日期:2005.12.1
[chemical reaction: see text]. We report the reduction of 2,3-dihydroisoxazoles to beta-amino ketones and beta-amino alcohols. The latter are obtained in high diastereoselectivity with preference for the syn isomer.