Scalable preparation of cyclic polymers by the ring-closure method assisted by the continuous-flow technique

2016 ◽  
Vol 7 (12) ◽  
pp. 2239-2244 ◽  
Author(s):  
Peng Sun ◽  
Jian'an Liu ◽  
Zhengbiao Zhang ◽  
Ke Zhang
Keyword(s):  
Continuous Flow ◽  
Ring Closure ◽  
Cyclic Polymers ◽  
First Time ◽  
Closure Method

Scalable preparation of cyclic polymers by the ring-closure strategy was achieved for the first time by virtue of the combination of a light-induced ring-closure method and the continuous-flow technique.

Efficient Homodifunctional Bimolecular Ring-Closure Method for Cyclic Polymers by Combining RAFT and Self-Accelerating Click Reaction

2017 ◽  
Vol 38 (15) ◽  
pp. 1700121 ◽  
Author(s):  
Lin Qu ◽  
Peng Sun ◽  
Ying Wu ◽  
Ke Zhang ◽  
Zhengping Liu
Keyword(s):  
Click Reaction ◽  
Ring Closure ◽  
Cyclic Polymers ◽  
Closure Method

Powerful Ring-Closure Method for Preparing Varied Cyclic Polymers

2014 ◽  
Vol 47 (12) ◽  
pp. 3775-3781 ◽  
Author(s):  
Qingquan Tang ◽  
Ying Wu ◽  
Peng Sun ◽  
Yongming Chen ◽  
Ke Zhang
Keyword(s):  
Ring Closure ◽  
Cyclic Polymers ◽  
Closure Method

Cyclic polymers based on UV-induced strain promoted azide–alkyne cycloaddition reaction

2015 ◽  
Vol 6 (22) ◽  
pp. 4096-4101 ◽  
Author(s):  
Peng Sun ◽  
Qingquan Tang ◽  
Zhenpeng Wang ◽  
Yuming Zhao ◽  
Ke Zhang
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Cycloaddition Reaction ◽  
Ring Closure ◽  
Atom Transfer ◽  
Cyclic Polymers ◽  
Closure Method

A unique ring-closure method was developed for the preparation of cyclic polymers based on the combination of atom transfer radical polymerization and UV-induced strain promoted azide–alkyne cycloaddition reaction.

Scalable Bimolecular Ring-Closure Method for Cyclic Polymers

2020 ◽  
Vol 53 (19) ◽  
pp. 8621-8630
Author(s):  
Liangcai Zhang ◽  
Ying Wu ◽  
Shumu Li ◽  
Yuanxing Zhang ◽  
Ke Zhang
Keyword(s):  
Ring Closure ◽  
Cyclic Polymers ◽  
Closure Method

A ring-closure method for preparing cyclic polymers from unconjugated vinyl monomers

2015 ◽  
Vol 6 (37) ◽  
pp. 6659-6663 ◽  
Author(s):  
Qingquan Tang ◽  
Jiqiang Chen ◽  
Yang Zhao ◽  
Ke Zhang
Keyword(s):  
Click Reaction ◽  
Living Polymerization ◽  
Ring Closure ◽  
Vinyl Monomers ◽  
Cyclic Polymers ◽  
Closure Method

A unique ring-closure method was developed specifically focusing on the preparation of cyclic polymers derived from unconjugated vinyl monomers by combining RAFT/MADIX living polymerization technique and UV-induced SPAAC click reaction.

Efficient Heterodifunctional Unimolecular Ring‐Closure Method for Cyclic Polymers by Combining RAFT and SuFEx Click Reactions

2019 ◽  
Vol 40 (20) ◽  
pp. 1900310 ◽  
Author(s):  
Wenying Liu ◽  
Shuxiang Zhang ◽  
Shengjie Liu ◽  
Zhaoqiang Wu ◽  
Hong Chen
Keyword(s):  
Ring Closure ◽  
Cyclic Polymers ◽  
Click Reactions ◽  
Closure Method

Microwave-Assisted Grafting to MCM-41 Silica and its Application as Catalyst in Flow Chemistry

2011 ◽  
Vol 64 (11) ◽  
pp. 1522 ◽  
Author(s):  
Manuela Oliverio ◽  
Antonio Procopio ◽  
Toma N. Glasnov ◽  
Walter Goessler ◽  
C. Oliver Kappe
Keyword(s):  
Continuous Flow ◽  
Rate Increase ◽  
Flow Chemistry ◽  
Conventional Heating ◽  
Kinetic Effect ◽  
Microwave Technology ◽  
Microwave Assisted ◽  
Technology Control ◽  
First Time ◽  
Mcm 41

Finding environmentally gentle methods to graft Lewis acid on the surface of mesoporous materials is a topic of current interest. Herein we describe the optimization of a preparation procedure of a mesoporous silica-supported ErIII catalyst using the microwave-assisted post-calcination functionalization of Mobil Composition of Matter-41 silica as the key step. The required time for functionalization was reduced from several hours to 10 min using sealed-vessel microwave technology. Control experiments using conventional heating at the same temperature demonstrated that the rate increase is owing to a simple thermal/kinetic effect as a result of the higher reaction temperature. The resulting ErIII catalyst was tested for the first time as a catalyst in the continuous flow deprotection of benzaldehyde dimethylacetal and a complete leaching study was performed.

Catalyst-Free One-Pot Synthesis of Novel Heteroarylamine Substituted Furo[3,2-c]coumarins

Synlett ◽  
2018 ◽  
Vol 29 (12) ◽  
pp. 1589-1592 ◽  
Author(s):  
Abolfazl Olyaei ◽  
Mahnaz Saraei ◽  
Reyhaneh Khoeiniha
Keyword(s):  
Michael Addition ◽  
Aldol Condensation ◽  
Ring Closure ◽  
Dehydration Reaction ◽  
One Pot ◽  
Catalyst Free ◽  
One Pot Synthesis ◽  
Tandem Process ◽  
First Time

A high-yielding cyclocondensation of 4-hydroxycoumarin, phenylglyoxal monohydrate, and heteroarylamines proceeds without catalysis, which gives novel functionalized furo[3,2-c]coumarins and heteroarylamino alkylation of coumarin products in acetonitrile under reflux, is reported for the first time. This tandem process involves sequentially an aldol condensation, Michael addition, a ring closure, and dehydration reaction.

Development and Evaluation of a High-Speed Continuous-Flow Analyzer

1972 ◽  
Vol 18 (9) ◽  
pp. 1013-1018
Author(s):  
M A Evenson ◽  
M A Olson
Keyword(s):  
Continuous Flow ◽  
High Speed ◽  
High Performance ◽  
Operating Characteristics ◽  
Raw Data ◽  
Automatic Computer ◽  
Carry Over ◽  
First Time

Abstract A high-speed, high-performance, continuous-flow analyzer is described that operates at two to three times the usual analysis rate without necessitating corrections of the raw data and with no decrease in accuracy or precision. At faster speeds (180-300 samples/h) inductive sample interaction (%Ii), opposite in direction to carry-over, is for the first time quantitatively measured. A correction equation for %Ii was developed, and when it is applied to raw data, the accuracy of the results are significantly improved. Operating characteristics of the high-speed analyzer are described and the desirability of automatic computer corrections is discussed for the high-speed system.

Sign in / Sign up

Export Citation Format

Share Document