Microwave-assisted synthesis of 1-hydrazinophosphonates via the reaction of aldazines with dialkyl phosphite
作者:Babak Kaboudin、Soheil Alipour
DOI:10.1002/hc.21019
日期:——
A simple, efficient, and novel method has been developed for the synthesis of 1-hydrazinophosphonic acids from aldazines. As described below, treatment of aldazines with diethyl phosphite gives the corresponding 1-hydrazinophosphonic acids in good yields. The reaction proceeds under microwave irradiation at 110°C and neutral condition without any additives such as base, acid, or catalyst. This method
The catalytic olefination reaction of aldehydes and ketones with CBr3CF3
作者:Valentine G. Nenajdenko、Georgy N. Varseev、Alexey V. Shastin、Elisabeth S. Balenkova
DOI:10.1016/j.jfluchem.2005.03.020
日期:2005.6
The new approach of catalytic olefination reaction (COR) has been used to convert aromatic and aliphaticaldehydes and ketones to 2-bromo-3,3,3-trifluoroprop-1-enes by the treatment of corresponding hydrazones with CBr3CF3 under copper(I) catalysis conditions. The reaction proceeds stereoselectively, the target alkenes were obtained in good yields.
Oxidized multiwalled nanotubes as efficient carbocatalyst for the general synthesis of azines
作者:Miguel A. Valle-Amores、Matías Blanco、Stefano Agnoli、Alberto Fraile、José Alemán
DOI:10.1016/j.jcat.2022.01.009
日期:2022.2
allows the synthesis of azines with application in nonlinear optics, and the organic materials and biological active compounds crafting. oxMWNT catalysed the reaction in just 3 h with full recyclability upon the recovery of the catalyst. In addition, due to the inherent oxMWNT oxidative capacity in the presence of nitric acid, we have also developed the one-potsynthesis of azines starting from alcohols
A new domino autocatalytic reaction leading to polyfunctionalized spiro[5.5]undecanes and dispiro[4.2.5.2]pentadecanes
作者:Bo Jiang、Wen-Juan Hao、Jin-Peng Zhang、Shu-Jiang Tu、Feng Shi
DOI:10.1039/b822645h
日期:——
A new domino autocatalytic reaction of imines with Meldrum's acid was described. In this reaction, a series of polycyclic spiro[5.5]undecane-1,5,9-trione and dispiro[4.2.5.2]pentadecane-9,13-dione derivatives, with remarkable diastereoselectivity, were successfully synthesized in acidic condition, and up to six new bonds were formed accompanied by the CN bond cleavage of the imines and the decomposition of Meldrum's acid, with by-product of acetohydrazide as a novel autocatalyst.
A Copper-Benzotriazole-Based Coordination Polymer Catalyzes the Efficient One-Pot Synthesis of (<i>N′</i>-Substituted)-hydrazo-4-aryl-1,4-dihydropyridines from Azines
作者:Michael Kallitsakis、Edward Loukopoulos、Alaa Abdul-Sada、Graham J. Tizzard、Simon J. Coles、George E. Kostakis、Ioannis N. Lykakis
DOI:10.1002/adsc.201601072
日期:2017.1.4
A series of new (N′‐substituted)‐hydrazo‐4‐aryl‐1,4‐dihydropyridines was successfully synthesized via a facile one‐pot catalytic pathway utilizing azines and propiolate esters as starting materials and a one‐dimensional copper benzotriazole‐based coordinationpolymer as catalyst. In the absence of catalyst, the corresponding 5‐substituted 4,5‐dihydropyrazoles were formed in moderate to high yields