Direct synthesis of various polar functionalized polypropylene materials with tunable molecular weights and high incorporation ratios

2021 ◽  
Vol 12 (38) ◽  
pp. 5495-5504
Author(s):  
Zhou Lu ◽  
Hui Wang ◽  
Shuaikang Li ◽  
Shengyu Dai
Keyword(s):  
Direct Synthesis ◽  
Molecular Weights ◽  
Highly Efficient ◽  
High Incorporation

As compared with the classical α-diimine catalyst, iminopyridyl catalysts were observed to be highly efficient for the direct synthesis of polar functionalized polypropylene with tunable molecular weights and high incorporation ratios.

Practical direct synthesis of N-aryl-substituted azacycles from N-alkyl protected arylamines using TiCl4 and DBU

2020 ◽  
Vol 18 (26) ◽  
pp. 5008-5016
Author(s):  
Van Hieu Tran ◽  
Minh Thanh La ◽  
Soosung Kang ◽  
Hee-Kwon Kim
Keyword(s):  
Direct Synthesis ◽  
Highly Efficient

Highly efficient direct transformations from N-alkyl protected arylamines such as N-methyl-, N-ethyl-, N-isopropyl, and N-tert-butyl arylamines into N-aryl substituted azacycles in the presence of TiCl4 and DBU have been developed.

An asymmetric acetate-Mannich reaction of chiral isatin derived ketimines and its applications

2017 ◽  
Vol 15 (43) ◽  
pp. 9217-9225 ◽  
Author(s):  
Saumen Hajra ◽  
Suhas Shivajirao Bhosale ◽  
Atanu Hazra
Keyword(s):  
Amino Acid ◽  
Mannich Reaction ◽  
Direct Synthesis ◽  
Highly Efficient ◽  
Excellent Selectivity

A highly efficient TMSOTf-mediated asymmetric acetate-Mannich reaction of chiral isatin derived ketimines and S-phenyl thioacetate was developed to afford the direct synthesis of indole-based β3,3-amino acid thioester with excellent selectivity (dr > 98 : 2). Syntheses of (+)-AG-041R and 3-aminopyrroloindoline have been accomplished utilizing the method.

ChemInform Abstract: An Organocatalytic Highly Efficient Approach to the Direct Synthesis of Substituted Carbazoles in Water.

ChemInform ◽  
2014 ◽  
Vol 45 (14) ◽  
pp. no-no
Author(s):  
Pradeep Kumar Jaiswal ◽  
Soumen Biswas ◽  
Shivendra Singh ◽  
Sampak Samanta
Keyword(s):  
Direct Synthesis ◽  
Efficient Approach ◽  
Highly Efficient

scholarly journals Direct Synthesis and Characterization of Photo-Crosslinkable Biodegradable PLA-PEG-PLA Ttiblock Copolymer with Methacrylates Functions by Green Montmorillonite Clay Catalyst

2020 ◽  
Vol 14 (4) ◽  
pp. 474-480
Author(s):  
Mohamed Benachour ◽  
◽  
Aslya El-Kebir ◽  
Amine Harrane ◽  
Rachid Meghabar ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Cationic Polymerization ◽  
Direct Synthesis ◽  
Average Molecular Weight ◽  
Montmorillonite Clay ◽  
Synthesis And Characterization ◽  
Molecular Weights ◽  
One Step ◽  
Clay Catalyst

Di-methacrylated PLA-PEG-PLA triblock copolymers of polylactide and polyethylene glycol were synthesized in one-step process by bulk cationic polymerization of lactide in the presence of PEG with different average molecular weights, using Maghnite-H+, an acidic montmorillonite clay, as a solid non-toxic catalyst. The obtained di-methacrylated copolymer was analyzed by 1H NMR and DSC. The effect of Maghnite-H+ proportions and PEG average molecular weight on the copolymerization and methacrylation yields and on average molecular weight of the resulting copolymers was studied.

Aroylacetylene Based Amino-Yne Click Polymerization toward Nitrogen Containing Polymers

2019 ◽  
Author(s):  
Xu Chen ◽  
Rong Hu ◽  
Bo Song ◽  
Anjun Qin ◽  
Ben Zhong Tang
Keyword(s):  
Room Temperature ◽  
Aqueous System ◽  
Secondary Amines ◽  
Primary Amines ◽  
Molecular Weights ◽  
Highly Efficient ◽  
Click Polymerization ◽  
Application Prospects

A highly efficient, spontaneous, and atom-economic polymerization of aroylacetylenes and amines at room temperature in air was established, and poly(<i>β</i>-enaminone)s with high molecular weights were produced in nearly quantitative yields. Moreover, singly <i>E</i>-configuration polymers can be obtained efficiently with secondary amines, while absolute <i>Z</i>-configuration products were prepared when using primary amines. In addition, the poly(<i>β</i>-enaminone)s can be degraded by primary amines in aqueous system to obtain definite compounds, proving their wide application prospects as degradable nitrogen containing polymers.

Direct synthesis of bifunctional nanorods from a Co–adenine–MoO3 hybrid for overall water splitting

2020 ◽  
Vol 4 (2) ◽  
pp. 546-554 ◽  
Author(s):  
Anning Jiang ◽  
Wei Zhang ◽  
Zegao Wang ◽  
Naga Pradeep Nidamanuri ◽  
Qiang Li ◽  
...  
Keyword(s):  
Water Splitting ◽  
Direct Synthesis ◽  
Core Shell ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Bifunctional Electrocatalysts ◽  
One Step

Well-defined core–shell Co-Mo2C@NGCS nanorods are designed and synthesized through one-step pyrolysis of a Co–adenine–MoO3 hybrid and are used as highly efficient bifunctional electrocatalysts for overall water splitting.

Sign in / Sign up

Export Citation Format

Share Document