1,3-dipolar cycloaddition reactions of levoglucosenone
作者:Alexander J. Blake、Tracey A. Cook、Angus C. Forsyth、Robert O. Gould、R.Michael Paton
DOI:10.1016/s0040-4020(01)80476-2
日期:1992.1
The cycloaddition reactions of levoglucosenone with various 1,3-dipoles have been examined. Benzonitrile oxide underwent regiospecific and face-selective cycloaddition yielding isoxazoline 2a as the major product. D-Glyceraldehyde-derived nitrile oxide 6 was less selective and afforded furazan N-oxide dimer 8 in addition to a mixture of isoxazolines. C,N-Diphenylnitrone and N-benzyl-C-phenylnitrone