Aerobic dehydrogenative imination in complete aqueous media catalyzed by poly(aniline sulfonic acid)/gold nanoparticles
摘要:
Dehydrogenative imination in aqueous media was achieved using poly(2-methoxyaniline-5-sulfonic acid) (PMAS)/gold nanoparticles, where PMAS worked as a redox mediator. (C) 2013 Elsevier Ltd. All rights reserved.
Indium-assisted aluminium-based stereoselective allylation of prostereogenic α,α-disubstituted cycloalkanones and imines
作者:Chennakesava Reddy、Srinivasarao Arulananda Babu、Nayyar Ahmad Aslam
DOI:10.1039/c4ra04293j
日期:——
Al0 for the allylation of a variety of prostereogenic α,α-disubstituted (hindered) cycloalkanones, 1,2-dione-based systems and various imino systems (CN functional groups) is reported. The stereoselective InCl3-catalyzed Al-based allylation of various 2-substituted-2-carbethoxycycloalkanones gave the corresponding products with moderate to excellent diastereoselectivity. The allylation and propargylation
The catalytic dehydrogenation and tandem transformation of aromatic alcohols, including oxidative coupling of alcohols and amines, were achieved successfully using a catalytic amount of organosilicon-supported titania (TiO2@PMHSIPN), which enables the efficient synthesis of aromatic aldehydes, imines, and benzimidazoles in good to excellent yields.
Highly Regioselective Synthesis of Substituted Pyrroles Utilizing Low-Valent Titanium Reagent
作者:Daqing Shi、Guolan Dou、Chunling Shi、Zhengyi Li、Shun-Jun Ji
DOI:10.1055/s-2007-990787
日期:2007.10
A short and efficientsynthesis of substituted pyrroles was accomplished in good yields via the novel coupling cyclization reaction of 1,3-diketones with imines promoted by low-valenttitaniumreagent. High regioselectivity was achieved and the structures of two of the products were confirmed by X-ray diffraction studies.
通过低价钛试剂促进的 1,3-二酮与亚胺的新型偶联环化反应,以良好的收率完成了取代吡咯的短而有效的合成。实现了高区域选择性,并且通过 X 射线衍射研究证实了两种产物的结构。
An asymmetric alkynylation/hydrothiolation cascade: an enantioselective synthesis of thiazolidine-2-imines from imines, acetylenes and isothiocyanates
作者:Alok Ranjan、Anupam Mandal、Swapnil G. Yerande、Dattatraya H. Dethe
DOI:10.1039/c5cc05549k
日期:——
Multicomponent reaction amongst imine, terminal alkyne, and isothiocyanate in presence of catalytic chiral copper-pybox complex proceedes enantioselectively to give enantiopure thiazolidine-2-imine (60-99% ee) by highly regioselective intramolecular 5-exo-dig hydrothiolation reaction.
Selectivity control in enantioselective four-component reactions of aryl diazoacetates with alcohols, aldehydes and amines: an efficient approach to synthesizing chiral β-amino-α-hydroxyesters
作者:Xinfang Xu、Jing Zhou、Liping Yang、Wenhao Hu
DOI:10.1039/b816104f
日期:——
Enantioselective four-component reactions of aryl diazoacetates with alcohols, aldehydes and amines catalyzed cooperatively by a rhodium complex and a chiral Bronsted acid produce beta-amino-alpha-hydroxyl acid derivatives in a single step with excellent control of chemo-, diastereo- and enantioselectivity.