The synthesis and structure of nitrogen-containing heterocycles are fascinating because
these compounds have a great richness of structural, physicochemical, and biological …

Efficient synthesis of 1, 3, 4-oxadiazole-2 (3 H)-one was achieved by CsF/18-crown-6
mediated 1, 3-dipolar cycloaddition of nitrile imine and 2.0 MPa of CO2. CsF/18-crown-6 …

5-Substituted-2-ethoxy-1, 3, 4-oxadiazoles were conveniently prepared through a one-pot
sequential N-acylation/dehydrative cyclization between ethyl carbazate and N …

A novel annulation reaction of N-(het) aroyldiazenes and isothiocyanates has been
established. This transformation involves a sequential cyclization and desulfurization …

This chapter is intended to give an overview on the recent developments in the field of the
palladium-catalyzed synthesis of carbonylated heterocycles by the direct introduction of …

We present a PPh3/DDQ-mediated regiospecific selective N-functionalization of
arylhydrazines with primary benzylic alcohols and aryl carboxylic acids for the synthesis of N …

A novel KI-catalyzed synthesis of 1, 3, 4-oxadiazol-2 (3H)-ones from aryl hydrazines, α-
oxocarboxylic acids and CO2 was reported. This process could effectively utilize CO2 from …

A convenient and efficient route has been developed to synthesize 1, 3, 4-oxadiazol-2 (3H)-
ones from CO2, hydrazines and aryl or aliphatic aldehydes. Promoted by hypoiodite (IO−) …

Palladium-catalyzed carbonylative coupling reactions have been a powerful method in
organic synthesis. The importance and significance have been described abundantly …

A series of 1, 3, 4‐oxadiazol‐2 (3H)‐ones were prepared by an efficient copper‐catalyzed
one‐pot reaction of arylhydrazides, arylboronic acids and DMF. Moderate to good yield of 1 …