scholarly journals A novel and highly efficient esterification process using triphenylphosphine oxide with oxalyl chloride

2018 ◽  
Vol 5 (2) ◽  
pp. 171988 ◽  
Author(s):  
Mingzhu Jia ◽  
Lixue Jiang ◽  
Fanfan Niu ◽  
Yu Zhang ◽  
Xiaoling Sun
Keyword(s):  
Nmr Spectroscopy ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
High Efficiency ◽  
Oxalyl Chloride ◽  
Triphenylphosphine Oxide ◽  
Coupling Reagents ◽  
Highly Efficient ◽  
Plausible Mechanism ◽  
Neutral Conditions

Triphenylphosphine oxide (TPPO) and oxalyl chloride ((COCl) 2 ) are used as novel and high-efficiency coupling reagents for the esterification of alcohols with carboxylic acids via the TPPO/(COCl) 2 system at room temperature for 1 h. The reaction represents the first TPPO-promoted esterification under mild and neutral conditions with excellent yields. Furthermore, we proposed a plausible mechanism with the help of 31 P NMR spectroscopy.

scholarly journals Efficient one-pot, four-component synthesis of N,N-dibenzyl-N-{1-[5-(3-aryl)-1,3,4-oxadiazol-2-yl]cyclobutyl}amine derivatives from the reaction of (isocyanoimino)triphenylphosphorane, dibenzylamine, an aromatic carboxylic acid and cyclobutanone

2012 ◽  
Vol 77 (9) ◽  
pp. 1175-1180 ◽  
Author(s):  
Nahid Shajari ◽  
Reza Kazemizadeh ◽  
Ali Ramazani
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aromatic Carboxylic Acid ◽  
One Pot ◽  
Aromatic Carboxylic Acids ◽  
High Yields ◽  
Neutral Conditions

Four-component reaction of cyclobutanone, dibenzylamine and (Nisocyanimino) triphenylphosphorane in the presence of aromatic carboxylic acids proceed smoothly at room temperature and under neutral conditions to afford N,N-dibenzyl-N-{1-[5-(3-aryl)-1,3,4-oxadiazol-2-yl]cyclobutyl}amine derivatives in high yields.

A high-efficient method for the amidation of carboxylic acids promoted by triphenylphosphine oxide and oxalyl chloride

2017 ◽  
Vol 28 (2) ◽  
pp. e21364 ◽  
Author(s):  
Lixue Jiang ◽  
Jing Yu ◽  
Fanfan Niu ◽  
Derundong Zhang ◽  
Xiaoling Sun
Keyword(s):  
Carboxylic Acids ◽  
Efficient Method ◽  
Oxalyl Chloride ◽  
Triphenylphosphine Oxide ◽  
High Efficient

scholarly journals I2-SDS-H2O System: A highly Efficient Dual Catalytic Green System for Deprotection of Imines and in Situ Preparation of Bis(indolyl)alkanes from Indoles in Water

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Parasa Hazarika ◽  
Pallab Pahari ◽  
Manash Jyoti Borah ◽  
Dilip Konwar
Keyword(s):  
Catalytic System ◽  
Room Temperature ◽  
One Pot ◽  
Highly Efficient ◽  
In Situ Preparation ◽  
System A ◽  
Neutral Conditions ◽  
Green System

A novel catalytic system consisting of I2-SDS-H2O has been developed which cleaves 2,3-diaza-1,3-butadiene, 1-aza-1,3-butadienes, oximes and in presence of indoles in the medium uses the corresponding aldehyde products to produce bis(indolyl)alkanes in situ. This one pot simple and mild dual catalytic system works in water at room temperature under neutral conditions.

Hydrogen generation from formic acid decomposition on a highly efficient iridium catalyst bearing a diaminoglyoxime ligand

2018 ◽  
Vol 20 (8) ◽  
pp. 1835-1840 ◽  
Author(s):  
Sheng-Mei Lu ◽  
Zhijun Wang ◽  
Jijie Wang ◽  
Jun Li ◽  
Can Li
Keyword(s):  
High Temperature ◽  
Formic Acid ◽  
Room Temperature ◽  
High Efficiency ◽  
Hydrogen Generation ◽  
Acid Decomposition ◽  
Highly Efficient ◽  
Iridium Catalyst ◽  
Formic Acid Decomposition ◽  
Aqueous Formic Acid

A new iridium catalyst bearing a dioxime derived ligand has been developed for aqueous formic acid (FA) dehydrogenation in the absence of any additives. These catalysts can work at high temperature or room temperature with high efficiency and stability.

A highly efficient, solvent-free and energy-effective method of cellulose acetylation

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Abdelmajid Memmi ◽  
Robert Granet ◽  
Yves Champavier ◽  
Pierre Krausz
Keyword(s):  
Nmr Spectroscopy ◽  
Acetic Anhydride ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Room Temperature ◽  
Solvent Free ◽  
Highly Efficient ◽  
Solvent Free Conditions ◽  
Cellulose Acetates

AbstractAcetylation of cellulose by acetic anhydride was found to be catalysed quantitatively by iodine under solvent-free conditions at room temperature. Cellulose acetates were characterised by 1H NMR spectroscopy.

Polymeric room-temperature molten salt as a multifunctional additive toward highly efficient and stable inverted planar perovskite solar cells

2020 ◽  
Vol 13 (12) ◽  
pp. 5068-5079
Author(s):  
Shuangjie Wang ◽  
Bowen Yang ◽  
Jian Han ◽  
Ziwei He ◽  
Tongtong Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Molten Salt ◽  
Room Temperature ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Multifunctional Additive ◽  
Highly Efficient ◽  
First Time ◽  
Excellent Stability

We for the first time report the application of a polymeric room-temperature molten salt in high efficiency and excellent stability inverted perovskite solar cells.

One-dimensional π–π stacking induces highly efficient pure organic room-temperature phosphorescence and ternary-emission single-molecule white light

2019 ◽  
Vol 7 (40) ◽  
pp. 12502-12508 ◽  
Author(s):  
Yating Wen ◽  
Haichao Liu ◽  
Shitong Zhang ◽  
Yu Gao ◽  
Yan Yan ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Room Temperature ◽  
High Efficiency ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
One Dimensional ◽  
Highly Efficient ◽  
Π Stacking ◽  
Radiative Rate

High-efficiency RTP of TX-Cl crystal was induced by one-dimensional π–π stacking, which significantly enhances both intersystem crossing (S1 → Tn) and radiative rate (T1 → S0). SMWLE was harvested by precisely controlling aggregating degree.

Copper-catalyzed highly efficient ester formation from carboxylic acids/esters and formates

2014 ◽  
Vol 12 (17) ◽  
pp. 2637-2640 ◽  
Author(s):  
Jun Liu ◽  
Changdong Shao ◽  
Yanghui Zhang ◽  
Guangfa Shi ◽  
Shulei Pan
Keyword(s):  
Carboxylic Acids ◽  
High Efficiency ◽  
Highly Efficient ◽  
Ester Formation

Copper-catalyzed ester formation from carboxylic acids/esters and formates has been developed with high efficiency and broad substrate scopes.

Construction of Esters through Sulfuryl Fluoride (SO2F2) Mediated Dehydrative Coupling of Carboxylic Acids with Alcohols at Room Temperature

Synthesis ◽  
2019 ◽  
Vol 51 (20) ◽  
pp. 3901-3907 ◽  
Author(s):  
Shi-Meng Wang ◽  
Njud S. Alharbi ◽  
Hua-Li Qin
Keyword(s):  
Carboxylic Acids ◽  
Room Temperature ◽  
Functional Group ◽  
High Efficiency ◽  
Sulfuryl Fluoride ◽  
Mild Conditions ◽  
High Yields

A facile method for the construction of esters through dehydrative coupling of carboxylic acids with alcohols is developed. The reactions are mediated by sulfuryl fluoride (SO2F2) at room temperature and proceed with high efficiency. The method has several advantages including broad substrate scope, mild conditions, excellent functional group compatibility and affords high yields, even on gram scale.

Ultra-thin TiO2 nanosheets decorated with Pd quantum dots for high-efficiency hydrogen production from aldehyde solution

2016 ◽  
Vol 4 (3) ◽  
pp. 796-800 ◽  
Author(s):  
Shaopeng Li ◽  
Hongyan Hu ◽  
Yingpu Bi
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Hydrogen Production ◽  
Room Temperature ◽  
High Efficiency ◽  
Hydrogen Generation ◽  
Formaldehyde Solution ◽  
Highly Efficient ◽  
Tio2 Nanosheets

We demonstrate that quantum-sized Pd dot-decorated ultra-thin anatase TiO2 nanosheets with exposed (001) facets exhibit a highly efficient catalytic activity for hydrogen generation from formaldehyde solution at room temperature.

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