Organocatalytic enantioselective synthesis of N-alkyl/aryl-3-alkyl-pyrrolidine-2,5-dione in brine
摘要:
A highly enantioselective approach has been developed for synthesising chiral succinimide derivatives via asymmetric Michael addition of diketones to maleimide using dihydroquinine as a catalyst in brine. The Michael adducts were obtained in yields up to 98% and with enantiomeric excesses up to 98% ee. (C) 2016 Elsevier Ltd. All rights reserved.
An unexpected formation of the novel 7-oxa-2-azabicyclo[2.2.1]hept-5-ene skeleton during the reaction of furfurylamine with maleimides and their bioprospection using a zebrafish embryo model
Chemical cascades in water for the synthesis of functionalized aromatics from furfurals
作者:Sally Higson、Fabiana Subrizi、Tom D. Sheppard、Helen C. Hailes
DOI:10.1039/c5gc02935j
日期:——
One-pot synthetic routes from furfurals to aromatic compounds have been developed in water, and the phthalimide products converted to functionalised benzenes.
已在水中开发了从糠醛到芳香化合物的一锅合成路线,并将邻苯二甲酰亚胺产品转化为官能化苯。
Haloamines as Bifunctional Reagents for Oxidative Aminohalogenation of Maleimides
maleimides with secondary amines and NXS (X = Cl, Br, I) was developed, in which the N–X bonds generated in situ were used as difunctionalized reagents. The distinctive features of this multicomponent reaction include a simple green catalytic system, a spectral substrate range, and the late-stage modification of drug molecules. Most importantly, this umpolung radical cascade strategy exploits the in situ
Organocatalyzed Synthesis of Highly Functionalized Phthalimides via Diels–Alder Reaction Employing Two Dienophiles
作者:Muhammad Saeed Akhtar、Yong Rok Lee
DOI:10.1021/acs.joc.0c01991
日期:2020.12.4
An efficient and facile protocol for the synthesis of biologically and pharmaceutically important phthalimides is developed by l-proline-catalyzed reaction between two dienophiles of α,β-unsaturated aldehydes and maleimides. The reaction involves an efficient benzannulation that proceeds via a formal [4 + 2] cycloaddition of azadiene intermediates generated in situ from enals and N-substituted maleimides
The first example of copper-catalyzed four-component coupling reaction of aryl iodides, Se powder, secondary amines, and maleimides is developed. This reaction provides an efficient and concise route to access aminoarylselenated maleimides via double C–Se bonds and C–N bond formation. The appealing features of this transformation are the use of Se powder as a selenating reagent, a green catalytic system
the first example of copper-catalyzed oxidative thioamination of maleimides with secondary amines and Bunte salts with the achievement of C-N and C-S bonds in a single flask. The protocol showcases a prominently broad substrate scope and is also efficient for the late-stage modification of an array of pharmaceuticals. Preliminary mechanistic investigation indicates copper-catalyzed oxidative amination