ChemInform Abstract: Recent Developments in the Use of Catalytic Asymmetric Ammonium Enolates in Chemical Synthesis

ChemInform ◽  
2008 ◽  
Vol 39 (16) ◽  
Author(s):  
Matthew J. Gaunt ◽  
Carin C. C. Johansson
2007 ◽  
Vol 107 (12) ◽  
pp. 5596-5605 ◽  
Author(s):  
Matthew J. Gaunt ◽  
Carin C. C. Johansson

2021 ◽  
Vol 2 (1) ◽  
pp. 168-186
Author(s):  
Bahareh Vafakish ◽  
Lee D. Wilson

The nanoreactor concept and its application as a modality to carry out chemical reactions in confined and compartmentalized structures continues to receive increasing attention. Micelle-based nanoreactors derived from various classes of surfactant demonstrate outstanding potential for chemical synthesis. Polysaccharide (glycan-based) surfactants are an emerging class of biodegradable, non-toxic, and sustainable alternatives over conventional surfactant systems. The unique structure of glycan-based surfactants and their micellar structures provide a nanoenvironment that differs from that of the bulk solution, and supported by chemical reactions with uniquely different reaction rates and mechanisms. In this review, the aggregation of glycan-based surfactants to afford micelles and their utility for the synthesis of selected classes of reactions by the nanoreactor technique is discussed. Glycan-based surfactants are ecofriendly and promising surfactants over conventional synthetic analogues. This contribution aims to highlight recent developments in the field of glycan-based surfactants that are relevant to nanoreactors, along with future opportunities for research. In turn, coverage of research for glycan-based surfactants in nanoreactor assemblies with tailored volume and functionality is anticipated to motivate advanced research for the synthesis of diverse chemical species.


Author(s):  
Yaseen Hussain ◽  
Pankaj Chauhan

This review article describes all the significant recent developments in catalytic asymmetric umpolung reactions of imines involving a 2-azaallyl anion intermediate.


1982 ◽  
Vol 10 (21) ◽  
pp. 6553-6570 ◽  
Author(s):  
Eiko Ohtsuka ◽  
Morio Ikehara ◽  
Dieter Söll

2020 ◽  
Vol 13 (3) ◽  
pp. 37 ◽  
Author(s):  
Xunan Zheng ◽  
Zhengning Ma ◽  
Dawei Zhang

Imidazole and its derivatives are one of the most vital and universal heterocycles in medicinal chemistry. Owing to their special structural features, these compounds exhibit a widespread spectrum of significant pharmacological or biological activities, and are widely researched and applied by pharmaceutical companies for drug discovery. The van Leusen reaction based on tosylmethylisocyanides (TosMICs) is one of the most appropriate strategies to synthetize imidazole-based medicinal molecules, which has been increasingly developed on account of its advantages. In this review, we summarize the recent developments of the chemical synthesis and bioactivity of imidazole-containing medicinal small molecules, utilizing the van Leusen imidazole synthesis from 1977.


2018 ◽  
Vol 47 (12) ◽  
pp. 4388-4480 ◽  
Author(s):  
Yasuhiro Yamashita ◽  
Tomohiro Yasukawa ◽  
Woo-Jin Yoo ◽  
Taku Kitanosono ◽  
Shū Kobayashi

Recent developments in catalytic asymmetric aldol reactions have been summarized.


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