Unusual retention of isoxazole ring under the influence of 3-(substituted nitrophenyl)-2-isoxazoline during catalytic hydrogenation of isoxazoline-substituted isoxazole systems
作者:Vijay Singh、Samiran Hutait、Gaya P. Yadav、Prakas R. Maulik、Sanjay Batra
DOI:10.1002/jhet.87
日期:2009.7
The cleavage of the isoxazole ring during the Raney-Ni-promoted catalytichydrogenation is prevented under the influence of 3-(substituted nitrophenyl)-2-isoxazoline in isoxazoline-substituted isoxazole systems produced via 1,3-dipolar cycloaddition either on the Baylis–Hillman derivatives or Grignard products. Unexpectedly, the hydrogenations in these diastereomeric compounds were observed to exclusively