2,4-Dinitrobenzenesulfonic acid in an efficient Brønsted acid-catalyzed controlled/living ring-opening polymerization of ε-caprolactone

RSC Advances ◽  
2014 ◽  
Vol 4 (99) ◽  
pp. 55716-55722 ◽  
Author(s):  
Huiying Wang ◽  
Wenzhuo Wu ◽  
Zhenjiang Li ◽  
Xu Zhi ◽  
Cheng Chen ◽  
...  
Keyword(s):  
Ring Opening ◽  
Diblock Copolymers ◽  
Ring Opening Polymerization ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acidic Catalyst ◽  
Brönsted Acid ◽  
Acid Catalyzed

2,4-Dinitrobenzenesulfonic acid as an efficient Brønsted acidic catalyst has been evaluated for the controlled/living ring-opening polymerization of ε-caprolactone end-functionalized, α,ω-dihydroxy telechelic poly(ε-caprolactone), and diblock copolymers were also synthesised successfully.

Ln(III)/Chiral Brønsted Acid Catalyzed Asymmetric Cascade Ring Opening/Aza-Piancatelli Rearrangement of D–A Cyclopropanes

2020 ◽  
Vol 22 (22) ◽  
pp. 9016-9021
Author(s):  
Lei Xu ◽  
Qian Yang ◽  
Sishi Zhong ◽  
Hongxiang Li ◽  
Yurong Tang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid

scholarly journals Brønsted Acid Catalyzed Azlactone Ring Opening With a Wide Range Substratre Scope

2013 ◽  
Author(s):  
Adriane A. Pereira ◽  
Pedro P. de Castro ◽  
Amanda C. de Mello ◽  
Giovanni W. Amarante
Keyword(s):  
Ring Opening ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Wide Range ◽  
Acid Catalyzed

Brønsted acid catalyzed azlactone ring opening by nucleophiles

Tetrahedron ◽  
2014 ◽  
Vol 70 (20) ◽  
pp. 3271-3275 ◽  
Author(s):  
Adriane A. Pereira ◽  
Pedro P. de Castro ◽  
Amanda C. de Mello ◽  
Bruno R.V. Ferreira ◽  
Marcos N. Eberlin ◽  
...  
Keyword(s):  
Ring Opening ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

Gold(I)- and Brønsted Acid-Catalyzed Ring-Opening of Unactivated Vinylcyclopropanes with Sulfonamides

2007 ◽  
Vol 349 (10) ◽  
pp. 1619-1623 ◽  
Author(s):  
Wen-Jian Shi ◽  
Yanyun Liu ◽  
Pietro Butti ◽  
Antonio Togni
Keyword(s):  
Ring Opening ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

A strong cationic Brønsted acid, [H(OEt2)2][Al{OC(CF3)3}4], as an efficient initiator for the cationic ring-opening polymerization of 2-alkyl-2-oxazolines

2013 ◽  
Vol 4 (3) ◽  
pp. 495-505 ◽  
Author(s):  
Tobias Rudolph ◽  
Kristian Kempe ◽  
Sarah Crotty ◽  
Renzo M. Paulus ◽  
Ulrich S. Schubert ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Cationic Ring Opening Polymerization

Three is company: dual intramolecular hydrogen-bond enabled carboxylic acid active in ring-opening polymerization

2016 ◽  
Vol 7 (5) ◽  
pp. 1111-1120 ◽  
Author(s):  
Jiaxi Xu ◽  
Jingjing Liu ◽  
Zhenjiang Li ◽  
Xiaopei Li ◽  
Cheng Chen ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Carboxylic Acid ◽  
Intramolecular Hydrogen Bond ◽  
Ring Opening ◽  
Active Catalyst ◽  
Ring Opening Polymerization ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Intramolecular Hydrogen

Dual intramolecular H-bonding made weak Brønsted acid an active catalyst in cationic ring-opening polymerizations.

scholarly journals Solventless Sol-Gel Chemistry Through Ring-Opening Polymerization of Bridged Disilaoxacyclopentanes

2000 ◽  
Vol 628 ◽  
Author(s):  
Kamyar Rahimian ◽  
Douglas A. Loy
Keyword(s):  
Ring Opening ◽  
Sol Gel ◽  
Ring Opening Polymerization ◽  
Inorganic Materials ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Organic Base ◽  
Triflic Acid ◽  
Brönsted Acid

Ring-opening polymerization (ROP) of disilaoxacyclopentanes has proven to be an excellent approach to sol-gel type hybrid orgainc-inorganic materials [1]. These materials have shown promise as precursors for encapsulation and microelectronics applications (Figure 1). The polymers are highly crosslinked and are structurally similar to traditional sol-gels, but unlike typical sol-gels they are prepared by an organic base or Bronsted acid (formic or triflic acid), without the use of solvents and water, they have low VOC's and show little shrinkage during processing.

Synthetic Scope of Brønsted Acid-Catalyzed Reactions of Carbonyl Compounds and Ethyl Diazoacetate

2021 ◽  
Author(s):  
Mizzanoor Rahaman ◽  
M. Shahnawaz Ali ◽  
Khorshada Jahan ◽  
Damon Hinz ◽  
Jawad Bin Belayet ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Ethyl Diazoacetate ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Catalyzed Reactions
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