An efficient palladium-catalyzed oxidative annulation reaction was developed through sequential isocyanide insertions into N-H and O-H bonds of hydrazides, which provides an efficient access to valuable 2-amino-1,3,4-oxadiazoles and their derivatives.
Gingh, B.; Sahai P., Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1995, vol. 25, p. 225 - 242