posted on 2014-12-05, 00:00authored byWenwen Chen, Bo Wang, Nan Liu, Dayun Huang, Xinyan Wang, Yuefei Hu
A tandem synthesis
of 3-halo-5-substituted isoxazoles has been
developed from 1-copper(I) alkynes and dihaloformaldoximes under base-free
conditions. Thus, 1,3-dipolar cycloaddition and all its drawbacks
can now be avoided completely.