Identification of dihydropyridines that reduce cellular tau levels
作者:Christopher G. Evans、Umesh K. Jinwal、Leah N. Makley、Chad A. Dickey、Jason E. Gestwicki
DOI:10.1039/c0cc02253e
日期:——
A series of dihydropyridines were identified that have an effect on the accumulation of tau, an important target in Alzheimer's disease. The dihydropyridine collection was expanded using the Hantzsch multicomponent reaction to develop preliminary structure–activity relationships.
Magnetically recyclable magnetite–ceria (Nanocat-Fe-Ce) nanocatalyst – applications in multicomponent reactions under benign conditions
作者:Manoj B. Gawande、Vasco D. B. Bonifácio、Rajender S. Varma、Isabel D. Nogueira、Nenad Bundaleski、C. Amjad A. Ghumman、Orlando M. N. D. Teodoro、Paula S. Branco
DOI:10.1039/c3gc40375k
日期:——
explored for the synthesis of dihydropyridines under benign conditions; a greener protocol is described that provides a simple and efficient method for the synthesis of functionalized 1,4-dihydropyridines using a recyclable nanocatalyst. Notably, 5.22 mol% of the catalyst is sufficient to catalyze the multicomponent reaction in ethanolic medium at room temperature. Importantly, the catalyst could be easily
Novel magnetic nanoparticles with morpholine tags as multirole catalyst for synthesis of hexahydroquinolines and 2-amino-4,6-diphenylnicotinonitriles through vinylogous anomeric-based oxidation
作者:Sima Kalhor、Meysam Yarie、Majid Rezaeivala、Mohammad Ali Zolfigol
DOI:10.1007/s11164-019-03802-7
日期:2019.6
magnetometry (VSM). The catalytic performance of the novel nanomagnetic catalyst was examined in multicomponent preparation of hexahydroquinolines and 2-amino-4,6-diphenylnicotinonitriles through vinylogous anomeric-based oxidation under mild reaction conditions. Graphical abstract Novel magnetic nanoparticles with morpholine tags promoted synthesis of hexahydroquinolines and 2-amino-4,6-diphenylnicotinonitriles
Straightforward Hantzsch four- and three-component condensation in the presence of triphenyl(propyl-3-sulfonyl)phosphoniumtrifluoromethanesulfonate {[TPPSP]OTf} as a reusable and green mild ionic liquid catalyst
作者:Seyed Mohammad Vahdat、Mohammad Ali Zolfigol、Saeed Baghery
DOI:10.1002/aoc.3433
日期:2016.5
reusable, green and benign ionicliquid catalyst has been used in the Hantzsch four‐component (synthesis of polyhydroquinolines) and three‐component (synthesis of acridines) condensation reactions of 1,3‐diones, β‐ketoesters, aldehydes, ammonium acetate and aniline derivatives in the presence of 0.5 mol% of [TPPSP]OTf} at room temperature under solvent‐free conditions. The new ionicliquid catalyst
Abstract Chitosan, a biodegradablegreencatalyst, was found to be an impressive system for one-pot four-component reaction of different aldehydes, dimedone, β‐ketoesters or acetoacetanilide, and ammonium acetate leading to 1,4-dihydropyridine derivatives via Hantzsch-type condensation under solvent-free condition. This methodology produces diverse superiorities such as operational simplicity, short