Simultaneous microwave and ultrasound irradiation: a rapid synthesis of hydrazides

An Unexpected and Green Synthetic Protocol for Ethyl 1-Aroyl/Aroylmethyl-5-methyl-3-methylthiopyrazole-4-carboxylates: High Regioselectivity in Alkylation and Acylation Reactions between N-1 and N-2 of a Pyrazole Ring

“…The ultrasound-assisted 8 and microwave-promoted [9][10][11] reactions have long been the focus of research interests and have showed such advantages as enhanced reaction rates, higher yields, milder reaction conditions, and higher selectivities. The alpha-haloketones are a class of versatile reagents in organic synthesis; they are, however, difficult to obtain and highly lachrymatory, toxic, and not readily available and which have been replaced in this work by eco-friendly alpha-tosyloxyketones prepared from [hydroxy(tosyloxy)-iodo]benzene (HTIB) [12][13][14] and corresponding ketones in the refluxing acetonitrile.…”

Nano Cu-catalyzed efficient and selective reduction of nitroarenes under combined microwave and ultrasound irradiation

“…As our continuing efforts on microwave and ultrasoundassisted reaction [36][37][38][39][40], we found that combined microwave and ultrasound irradiation (CMUI) could strongly promote the nano Cu-catalyzed reduction of aromatic nitro compounds due to its simultaneous enhancement on heat and mass transfer. High reaction rate, low dosage of catalyst and excellent yields were achieved via a chemoselective reduction of aromatic nitro compounds with hydrazine hydrate under CMUI.…”

Enzymatic Synthesis of Fatty Hydrazides from Palm Oils

“…Hydrazides also have been used for analytical chemistry as chelating agents 5) . To date, a variety of procedures have been developed to prepare hydrazides [6][7] . The most widely used method to prepare hydrazides is to treat the corresponding esters with hydrazine monohydrate 8) .…”