ChemInform Abstract: An Improved One-Pot Cost-Effective Synthesis of N,N-Disubstituted Carbamoyl Halides and Derivatives.

ChemInform ◽  
2011 ◽  
Vol 42 (20) ◽  
pp. no-no
Author(s):  
K. Adeppa ◽  
D. C. Rupainwar ◽  
Krishna Misra
Keyword(s):  
Cost Effective ◽  
One Pot ◽  
Effective Synthesis

scholarly journals Amberlite IR-120 Catalyzed Green and Efficient One-Pot Synthesis of Benzylpyrazolyl Coumarin in Aqueous Medium

2021 ◽  
Vol 10 (3) ◽  
pp. 2525-2534
Keyword(s):  
Reaction Time ◽  
Aqueous Medium ◽  
Ethyl Acetoacetate ◽  
Low Cost ◽  
Cost Effective ◽  
High Yield ◽  
Phenyl Hydrazine ◽  
One Pot ◽  
Time Operation ◽  
Effective Synthesis

An efficient, green, and cost-effective synthesis of benzylpyrazolyl coumarin by one-pot four-component condensation of hydrazine hydrate or phenyl hydrazine, ethyl acetoacetate, aromatic aldehyde, and 4-hydroxycoumarin in the presence of Amberlite IR-120 as a catalyst in an aqueous medium has been reported. Shorter reaction time, operation simplicity, low cost of catalyst, and aqueous medium are key advantages of this method for synthesizing benzylpyrazolyl coumarin in moderate to high yield.

An improved one-pot cost-effective synthesis of N,N-disubstituted carbamoyl halides and derivatives

2010 ◽  
Vol 88 (12) ◽  
pp. 1277-1280 ◽  
Author(s):  
K. Adeppa ◽  
D. C. Rupainwar ◽  
Krishna Misra
Keyword(s):  
Organic Solvent ◽  
Carbonyl Group ◽  
Cost Effective ◽  
Secondary Amines ◽  
One Pot ◽  
Effective Synthesis

A convenient one-pot procedure is reported for preparing N,N-disubstituted carbamoyl chlorides by using chlorocarbonylsulfenyl chloride as a carbonylating agent. It comprises the reaction of secondary amines with chlorocarbonylsulfenyl chloride in the presence of an aprotic organic solvent to produce the corresponding N,N-disubstituted carbamoyl halides. Insertion of the carbonyl group without using phosgene is the novelty of this method.

Cost Effective Synthesis and Fabrication of Phase-Pure Kesterite Cu2-xZn1.3SnS4 P-type Absorber Layer Thin Films by Solvent Based Process Technique for Photovoltaic Solar Energy Applications

2018 ◽  
Vol 7 (4) ◽  
pp. 36
Author(s):  
B. Khadambari ◽  
S. S. Bhattacharya
Keyword(s):  
Solar Energy ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Absorber Layer ◽  
Window Layer ◽  
Energy Applications ◽  
Process Technique ◽  
Absorber Material ◽  
Effective Synthesis ◽  
P Type

Solar has become one of the fastest growing renewable energy sources. With the push towards sustainability it is an excellent solution to resolve the issue of our diminishing finite resources. Alternative photovoltaic systems are of much importance to utilize solar energy efficiently. The Cu-chalcopyrite compounds CuInS2 and CuInSe2 and their alloys provide absorber material of high absorption coefficients of the order of 105 cm-1. Cu2ZnSnS4 (CZTS) is more promising material for photovoltaic applications as Zn and Sn are abundant materials of earth’s crust. Further, the preparation of CZTS-ink facilitates the production of flexible solar cells. The device can be designed with Al doped ZnO as the front contact, n-type window layer (e.g. intrinsic ZnO); an n-type thin film buffer layer (e.g. CdS) and a p-type CZTS absorber layer with Molybdenum (Mo) substrate as back contact. In this study, CZTS films were synthesized by a non-vaccum solvent based process technique from a molecular-ink using a non toxic eco-friendly solvent dimethyl sulfoxide (DMSO). The deposited CZTS films were optimized and characterized by XRD, UV-visible spectroscopy and SEM.

scholarly journals Facile Synthesis of COF-Supported Reduced Pd-Based Catalyst for One-Pot Reductive Amination of Aldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 287
Author(s):  
Jianguo Liu ◽  
Mingyue Zhang ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Secondary Amines ◽  
Metallic State ◽  
One Pot ◽  
Effective Synthesis ◽  
Pharmaceutical Industries ◽  
The One ◽  
Heterocyclic Aldehydes ◽  
Supported Pd

Dibenzylamine motifs are an important class of crucial organic compounds and are widely used in fine chemical and pharmaceutical industries. The development of the efficient, economical, and environmentally friendly synthesis of amines using transition metal-based heterogeneous catalysts remains both desirable and challenging. Herein, we prepared the covalent organic framework (COF)-supported heterogeneous reduced COF-supported Pd-based catalyst and used it for the one-pot reductive amination of aldehydes. There are both Pd metallic state and oxidated Pdσ+ in the catalysts. Furthermore, in the presence of the reduced COF-supported Pd-based catalyst, many aromatic, aliphatic, and heterocyclic aldehydes with various functional groups substituted were converted to their corresponding amines products in good to excellent selectivity (up to 91%) under mild reaction conditions (70 °C, 2 h, NH3, 20 bar H2). This work expands the covalent organic frameworks for the material family and its support catalyst, opening up new catalytic applications in the economical, practical, and effective synthesis of secondary amines.

Sign in / Sign up

Export Citation Format

Share Document