Selective reduction of nitro-compounds to primary amines by nickel-catalyzed hydrosilylative reduction
作者:Shuai Sun、Zhengjun Quan、Xicun Wang
DOI:10.1039/c5ra17731f
日期:——
found to be an excellent catalytic system for the chemoselective transfer hydrogenation of nitro-compounds to primary amines. Under mild conditions a series of nitro-compounds containing a variety of sensitive functional groups including aldehydes, esters, cyano, and nitrine were reduced to their corresponding amines in good to excellent yields with no byproduct.
Here, we created and synthesized a heterogeneous catalyst from porphyrazinatozinc (tmtppa-Zn) supported on DFNS (tmtppa-Zn/DFNS). This is a simple method for hydrogenation of nitro-compounds and their conversion to primary amines without producing toxic by-products. These reactions take place under mild reaction situations. The catalyst system was comfortably retrieved and reutilized in at least ten
Synthesis of new N3- substituted dihydropyrimidine derivatives as L-/T- type calcium channel blockers
作者:Mohamed Teleb、Fang-Xiong Zhang、Ahmed M. Farghaly、Omaima M. Aboul Wafa、Frank R. Fronczek、Gerald W. Zamponi、Hesham Fahmy
DOI:10.1016/j.ejmech.2017.03.080
日期:2017.7
Cardiovascular diseases (CVDs) are the main cause of deaths worldwide. Up-to-date, hypertension is the most significant contributing factor to CVDs. Recent clinical studies recommend calciumchannelblockers (CCBs) as effective treatment alone or in combination with other medications. Being the most clinically useful CCBs, 1,4-dihydropyridines (DHPs) attracted great interest in improving potency and