The heterocyclization of 2-hydroxybenzoic acid anilides with acetylene in the presence of a catalyzing mixture of potassium hydroxide with cadmium oxide or cadmium acetate alone gives o-, m-, and p-vinyloxy-substituted 1,3-benzoxazin-4-ones.
Skvortsova, G. G.,Stepanova, Z. V.,Andriyankova, L. V.,Voronov, V. K.
p. 379 - 382
(2007/10/02)
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