Efficient Synthesis of α‐Trifluoromethyl Carboxylic Acids and Esters through Fluorocarboxylation of gem ‐Difluoroalkenes

2019 ◽  
Vol 58 (20) ◽  
pp. 6772-6775 ◽  
Author(s):  
Woo‐Jin Yoo ◽  
Junpei Kondo ◽  
José A. Rodríguez‐Santamaría ◽  
Thanh V. Q. Nguyen ◽  
Shū Kobayashi
Keyword(s):  
Carboxylic Acids ◽  
Efficient Synthesis

Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature

2018 ◽  
Vol 73 (9) ◽  
pp. 641-645 ◽  
Author(s):  
Sepehr Sadegh-Samiei ◽  
Shahrzad Abdolmohammadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aqueous Media ◽  
Reaction Times ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Moderate Reaction ◽  
Recyclable Heterogeneous Catalyst

AbstractA novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate reaction conditions (room temperature, aqueous media).

A Schiff base-modified silver catalyst for efficient fixation of CO2 as carboxylic acid at ambient pressure

2017 ◽  
Vol 19 (9) ◽  
pp. 2080-2085 ◽  
Author(s):  
Zhilian Wu ◽  
Lei Sun ◽  
Qinggang Liu ◽  
Xiaofeng Yang ◽  
Xue Ye ◽  
...  
Keyword(s):  
Schiff Base ◽  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Ambient Pressure ◽  
Terminal Alkynes ◽  
Silver Catalyst ◽  
Efficient Synthesis

A Schiff base-modified silver catalyst was developed for the direct carboxylation of terminal alkynes with CO2, enabling the efficient synthesis of valuable alkynyl carboxylic acids.

Efficient synthesis of esters through oxone-catalyzed dehydrogenation of carboxylic acids and alcohols

2018 ◽  
Vol 16 (48) ◽  
pp. 9472-9476 ◽  
Author(s):  
Fei Hou ◽  
Xi-Cun Wang ◽  
Zheng-Jun Quan
Keyword(s):  
Carboxylic Acids ◽  
Environmentally Friendly ◽  
Attractive Alternative ◽  
Efficient Synthesis

An environmentally friendly oxone (20 mol%) catalyzed esterification of carboxylic acids with alcohols has been developed, providing an attractive alternative to the construction of valuable carbonyl esters.

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