Regeneration of Carbonyl Compounds from Azines with Cerium(IV) Ammonium Nitrate
作者:Miroslaw Giurg、Jacek Mlsochowski
DOI:10.1080/00397919908086590
日期:1999.12.1
Abstract Azines treated with cerium(IV) ammoniumnitrate in acetonitrile under mild conditions afforded aromatic aldehydes and ketones in high to excellent yields.
Reduction of carbonyl moieties to the corresponding alcohol using simply hydrazine hydrate has been considerably unfeasible until now due to the well-known condensation reaction. However, herein, we report that using an excess of 20-fold equivalents, the reduction proceeds in excellent yields. 1H NMR study of the reaction and density functional theory (DFT) calculations indicate that the final fate
迄今为止,由于众所周知的缩合反应,使用简单的水合肼将羰基部分还原为相应的醇是相当不可行的。但是,在本文中,我们报道使用超过20倍的当量,还原反应会以极好的收率进行。反应和密度泛函理论(DFT)计算的1 H NMR研究表明,半胱氨酸中间体的最终命运对于获得醇或hydr至关重要。
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
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.