Electrochemical-mediated fixation of CO2: three-component synthesis of carbamate compounds from CO2, amines and N-alkenylsulfonamides

2021 ◽  
Author(s):  
Ting-Kai Xiong ◽  
Xue-Qi Zhou ◽  
Min Zhang ◽  
Hai-Tao Tang ◽  
Ying-Ming Pan ◽  
...  
Keyword(s):  
Efficient Method ◽  
Environmentally Friendly ◽  
Cascade Reaction

An electrocatalyzed three-component cascade reaction of CO2, amines, and N-alkenylsulfonamides is developed, providing an environmentally friendly and efficient method of synthesizing a series of new carbamate compounds. This reaction meets...

scholarly journals N-acylation of amides through internal nucleophilic catalysis

2020 ◽  
pp. 174751982092575
Author(s):  
Meng Yao ◽  
Xia Chen ◽  
Yuling Lu ◽  
Zhenhua Guan ◽  
Zengwei Luo ◽  
...  
Keyword(s):  
Natural Products ◽  
Efficient Method ◽  
Pyridine Ring ◽  
Environmentally Friendly ◽  
Biologically Active ◽  
Active Materials ◽  
Nucleophilic Catalysis

An efficient method for N-acylation of amides is described using a pyridine ring as the internal nucleophilic catalyst to give imides in moderate to excellent yields. The methodology provides a facile, air insensitive, and environmentally friendly route to form diversified imide scaffolds, which exist widely in natural products and biologically active materials.

Physicochemical properties of a urea/zinc chloride eutectic mixture and its improved effect on the fast and high yield synthesis of indeno[2,1-c]quinolines

2020 ◽  
Vol 44 (19) ◽  
pp. 7987-7997
Author(s):  
Diana Peña-Solórzano ◽  
Vladimir V. Kouznetsov ◽  
Cristian Ochoa-Puentes
Keyword(s):  
Physicochemical Properties ◽  
Efficient Method ◽  
Zinc Chloride ◽  
Acidic Medium ◽  
Eutectic Mixture ◽  
Environmentally Friendly ◽  
High Yield

An environmentally friendly and efficient method for the synthesis of indeno[2,1-c]quinolines is developed using a urea/zinc chloride eutectic mixture as a green mildly acidic medium.

Copper(II)-Promoted Oxidation/[3+2]Cycloaddition/Aromatization Cascade: Efficient Synthesis of Tetrasubstituted NH-Pyrrole from Chalcones and Iminodiacetates

Synlett ◽  
2019 ◽  
Vol 30 (12) ◽  
pp. 1442-1446 ◽  
Author(s):  
Zhang-qi Lin ◽  
Chao-dong Li ◽  
Zi-chun Zhou ◽  
Shuai Xue ◽  
Jian-rong Gao ◽  
...  
Keyword(s):  
Efficient Method ◽  
Cascade Reaction ◽  
Oxidative Cyclization ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Wide Range ◽  
Reaction Proceeds

A simple and highly efficient method for the preparation of tetrasubstituted NH-pyrrole from a wide range of chalcones and diethyl iminodiacetates via a Cu(OAc)2-promoted oxidation/[3+2]cycloaddition/aromatization cascade reaction has been developed. This reaction proceeds through dehydrogenations, deamination, and oxidative cyclization, affording the corresponding products in good to excellent yields. This convenient methodology for constructing tetrasubstituted NH-pyrroles has several advantages over existing methods, such as the use of easily accessible chalcones and readily available diethyl iminodiacetates, and mild reaction conditions. A wide range of substrates are tolerated.

Enzymatic waterborne polyurethane towards a robust and environmentally friendly anti-biofouling coating

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31698-31704 ◽  
Author(s):  
Kai Liu ◽  
Zhiguo Su ◽  
Shida Miao ◽  
Guanghui Ma ◽  
Songping Zhang
Keyword(s):  
Efficient Method ◽  
Castor Oil ◽  
Environmentally Friendly ◽  
Waterborne Polyurethane

A simple, green, robust and efficient method has been developed for the preparation of an anti-biofouling coating by directly mixing antifouling enzymes with a castor oil-based waterborne polyurethane (WPU) dispersion.

Environmentally friendly and efficient method for the synthesis of the new α , α ′‐diimine ligands with benzimidazole moiety

2020 ◽  
Vol 57 (6) ◽  
pp. 2466-2479
Author(s):  
Vakhid A. Mamedov ◽  
Nataliya A. Zhukova ◽  
Milyausha S. Kadyrova ◽  
Rezeda R. Fazleeva ◽  
Olga B. Bazanova ◽  
...  
Keyword(s):  
Efficient Method ◽  
Environmentally Friendly ◽  
Diimine Ligands

scholarly journals A Green and Efficient Method for the Preparation of 3,4-Dihydropyrimidin-2(1H)-ones Using Quaternary Ammonium-Treated Clay in Water

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Soheil Sayyahi ◽  
Sedigheh Jahanbakhshi ◽  
Zahra Dehghani
Keyword(s):  
Efficient Method ◽  
Quaternary Ammonium ◽  
Biginelli Reaction ◽  
Environmentally Friendly

A variety of 3,4-dihydropyrimidin-2(1H)-ones derivatives were synthesized via three-component Biginelli reaction. The quaternary ammonium-treated clay-catalyzed process proved to be simple, efficient, and environmentally friendly.

scholarly journals Lytic polysaccharide monooxygenase (LPMO) mediated production of ultra-fine cellulose nanofibres from delignified softwood fibres

2019 ◽  
Vol 21 (21) ◽  
pp. 5924-5933 ◽  
Author(s):  
Salla Koskela ◽  
Shennan Wang ◽  
Dingfeng Xu ◽  
Xuan Yang ◽  
Kai Li ◽  
...  
Keyword(s):  
Efficient Method ◽  
Energy Efficient ◽  
Environmentally Friendly ◽  
Oxidative Enzymes ◽  
Lytic Polysaccharide Monooxygenase ◽  
Lytic Polysaccharide Monooxygenases ◽  
Cellulose Nanofibres ◽  
Polysaccharide Monooxygenases ◽  
Polysaccharide Monooxygenase

An environmentally friendly, energy-efficient method for cellulose nanofibre (CNF) production from softwood holocellulose utilising oxidative enzymes, lytic polysaccharide monooxygenases (LPMOs).

An efficient method for retro-Claisen-type C–C bond cleavage of diketones with tropylium catalyst

2018 ◽  
Vol 54 (92) ◽  
pp. 12970-12973 ◽  
Author(s):  
M. A. Hussein ◽  
V. T. Huynh ◽  
R. Hommelsheim ◽  
R. M. Koenigs ◽  
T. V. Nguyen
Keyword(s):  
Efficient Method ◽  
Bond Cleavage ◽  
Environmentally Friendly ◽  
Type C

We report a new convenient and efficient method utilizing the tropylium ion as a mild and environmentally friendly organocatalyst to mediate retro-Claisen-type reactions.

scholarly journals Eco-friendly methoximation of aromatic aldehydes and ketones using MnCl 2 .4H 2 O as an easily accessible and efficient catalyst

2021 ◽  
Vol 8 (7) ◽  
pp. 210142
Author(s):  
Melina C. Ontivero ◽  
Teodoro S. Kaufman ◽  
Iván Cortés ◽  
Andrea B. J. Bracca
Keyword(s):  
Efficient Method ◽  
Environmentally Friendly ◽  
Aromatic Aldehydes ◽  
Fine Chemicals ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Aldehydes And Ketones

Methoximes are important as a class of intermediates and products, among fine chemicals and specialties. The development of a new, facile and efficient method for their synthesis is reported. The methoximes were properly accessed from the corresponding aromatic aldehydes and ketones in good to excellent yields, under mild conditions, employing the inexpensive and environmentally friendly MnCl 2 .4H 2 O as a catalyst (at low loading and without the addition of ligand), in EtOH at 50°C. The scope of the process was systematically assessed.

Squaramide-Catalyzed Asymmetric Michael/Cyclization Cascade Reaction of Unsaturated Thiazolidinones and 3-Isothiocyanato Oxindoles: Synthesis of New Bispirocyclic Heterocycles

Synthesis ◽  
2018 ◽  
Vol 50 (07) ◽  
pp. 1535-1545 ◽  
Author(s):  
Da-Ming Du ◽  
Yong-Xing Song
Keyword(s):  
Efficient Method ◽  
Cascade Reaction ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Chiral Centers ◽  
High Yields

A highly efficient method for the construction of oxindole-pyrrolidone-thiazolidinone bispirocyclic heterocycles bearing three contiguous chiral centers including two quaternary one via a Michael/cyclization cascade reaction has been developed. Using bifunctional cinchona-derived squaramide as catalyst, the reactions of 3-isothio­cyanato oxindoles with unsaturated thiazolidinone derivatives proceeded smoothly under mild reaction conditions to afford a series of complex chiral oxindole-pyrrolidone-thiazolidinone bispirocyclic heterocycles in high yields (up to 99%) with excellent diastereo- and enantioselectivities (up to >99:1 dr, >99% ee).

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