Results 81 to 90 of about 10,800 (238)

Bi(III)-Catalyzed Enantioselective Allylation Reactions of Ketimines

iScience, 2019
Summary: Chiral homoallylic amines not only are found in pharmaceutically relevant compounds but also serve as versatile building blocks for chemical synthesis.
Jie Wang, Qingxia Zhang, Biying Zhou, Chen Yang, Xin Li, Jin-Pei Cheng   +5 more
doaj   +1 more source

Thiourea-catalyzed addition of indoles to aliphatic β,γ-unsaturated α-ketoesters [PDF]

, 2015
Communication.A thiourea-catalyzed addition reaction with indoles to aliphatic β,γ-unsaturated α-ketoesters has been developed. The easily accessible thiourea aminoindanol derivative makes this approach an interesting alternative for the use of these ...
Herrera, Raquel P., Juste-Navarro, Verónica, Marqués-López, Eugenia   +2 more
core   +1 more source

Enantioselective Reductions Promoted by (Cyclopentadienone)iron Complexes

CHIMIA, 2017
(Cyclopentadienone)iron complexes have recently gained widespread interest as cheap metal-based pre-catalysts for the reduction of carbonyl compounds and imines, thanks to their air- and moisture-stability and easy synthesis/purification.
Umberto Piarulli, Sofia Vailati Fachini, Luca Pignataro   +2 more
doaj   +1 more source

Oxetanes: Recent Advances in Synthesis, Reactivity and Medicinal Chemistry [PDF]

, 2016
The 4-membered oxetane ring has been increasingly exploited for its behaviors, i.e. influence on physicochemical properties as a stable motif in medicinal chemistry, and propensity to undergo ring opening reactions as a synthetic intermediate.
Bull, JA, Croft, RA, Davis, OA, Doran, R, Morgan, KF   +4 more
core   +1 more source

Atomically precise metal cluster enzymes for pathological tissue regeneration

BMEMat, EarlyView.
Schematic illustration of atomically precise metal cluster enzymes (MCEs) for pathological tissue regeneration. Atomically precise MCEs can modulate biological processes, such as attenuation of inflammatory responses, eradication of bacterial pathogens, regulation of angiogenesis, and promotion of cell development.
Ziqiang Xiong, Zhifeng Shi, Mengqing Li, Jien Han, Haoyan Chen, Maofei Ran, Shaojian Zhong, Limin Ma, Chengyun Ning, Youzhun Fan, Zhenghua Tang, Peng Yu   +11 more
wiley   +1 more source

Enantioselectivity in Transition Metal Catalyzed Propargylic Substitution Reactions: A Theoretical Perspective

Chemistry – A European Journal, EarlyView.
Recent theoretical efforts to elucidate the origin of enantioselectivity in transition metal‐catalyzed propargylic substitution reactions are highlighted in this review. ABSTRACT In recent years, asymmetric catalytic propargylic substitution reactions have undergone remarkable development, enabling the construction of chiral carbon centers adjacent to ...
Ken Sakata, Yoshiaki Nishibayashi
wiley   +1 more source

Bifunctional Photocatalysts: Exploiting Proximity for Enhanced Reaction Performance

Chemistry – A European Journal, EarlyView.
This review covers the application of the bifunctional approach to photocatalysis as a means to attain (enhanced) enantioselectivity, and, more in general, as a strategy to enhance the catalytic performance through an effective use of short‐lived reaction intermediates.
Luigi Dolcini, Daniele Lavelli, Alberto Dal Corso, Luca Pignataro   +3 more
wiley   +1 more source

Chiral Phosphoric Acid-Catalyzed Asymmetric Synthesis of Axially Chiral Arylpyrazole

Organic Letters
A chiral phosphoric acid-catalyzed efficient, operationally simple, general method for straightforward syntheses of axially chiral arylpyrazole employing 3-aryl-5-aminopyrazoles reacting with azonaphthalenes was firstly reported. A wide variety of axially chiral heterobiaryl diamines in generally good yields with excellent enantioselectivities were ...
Shi-Wu Li, Yu Qi, Shujun Tong, Jiaqi Pu
openaire   +1 more source

Engineered Metal–Organic Frameworks‐Based Materials for Environmental Detection

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Engineered metal–organic frameworks (MOFs) regulated by various material modification strategies are discussed for environmental contaminant detection under different sensing mechanisms, providing future improvements of MOFs in environmental detection. Sensitive and selective detection of contaminants is crucial for environmental protection.
Pan Gao, Song Wang, Yuechao Yao, Yibo Dou   +3 more
wiley   +1 more source

Catalytic enantioselective synthesis of inherently chiral calix[4]arenes via organocatalyzed aromatic amination enabled desymmetrization

Nature Communications
Inherently chiral calix[4]arenes represent a distinct class of chiral frameworks whose chirality arises from the dissymmetry of the entire molecule. Although these chiral scaffolds have been widely applied in various research fields, their catalytic ...
Mengyao Yuan, Wansen Xie, Shaoze Yu, Tong Liu, Xiaoyu Yang   +4 more
doaj   +1 more source