Bulk solvent-free ring-opening copolymerization of CHO and MA catalyzed by series of Cr(III) asymmetrical bis-Schiff-base complexes

A stereoselective, solvent-free ring-opening polymerisation (ROP) of lactide (LA) in supercritical carbon dioxide (scCO2) is reported for the first time.

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Cobalt(II), copper(II), zinc(II) and palladium(II) Schiff base complexes: Synthesis, characterization and catalytic performance in selective oxidation of sulfides using hydrogen peroxide under solvent-free conditions

Polyhedron ◽

10.1016/j.poly.2015.03.041 ◽

2015 ◽

Vol 95 ◽

pp. 1-13 ◽

Cited By ~ 54

Author(s):

Mahsa Khorshidifard ◽

Hadi Amiri Rudbari ◽

Banafshe Askari ◽

Mehdi Sahihi ◽

Mostafa Riahi Farsani ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Schiff Base ◽

Selective Oxidation ◽

Catalytic Performance ◽

Solvent Free ◽

Schiff Base Complexes ◽

Oxidation Of Sulfides ◽

Solvent Free Conditions

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Solvent-Free Ring Cleavage Hydrazinolysis of Certain Biginelli Pyrimidines

Journal of Chemistry ◽

10.1155/2018/6354742 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Mohamed A. Said ◽

Wagdy M. Eldehna ◽

Hazem A. Ghabbour ◽

Maha M. Kabil ◽

Nasser S. Al-shakliah ◽

...

Keyword(s):

Hydrazine Hydrate ◽

Ring Opening ◽

Solvent Free ◽

Nucleophilic Attack ◽

Ring Cleavage ◽

Amino Group ◽

Free Ring ◽

Terminal Amino ◽

Solvent Free Reaction

Certain Biginelli pyrimidines with ester substitution in C5 were subjected to unexpected ring opening upon solvent-free reaction with hydrazine hydrate to give three products: pyrazole, arylidenehydrazines, and urea/thiourea, respectively. The nonisolable carbohydrazide intermediates are formed firstly followed by the intermolecular nucleophilic attack of terminal amino group of hydrazide function on sp2 C6 rather than the sp3 C4 to give the ring adduct which was produced as a final product.

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Multinuclear alkylaluminium macrocyclic Schiff base complexes: influence of procatalyst structure on the ring opening polymerisation of ε-caprolactone

Chemical Communications ◽

10.1039/b810417d ◽

2008 ◽

pp. 4717 ◽

Cited By ~ 87

Author(s):

Abdessamad Arbaoui ◽

Carl Redshaw ◽

David L. Hughes

Keyword(s):

Schiff Base ◽

Ring Opening ◽

Schiff Base Complexes ◽

Macrocyclic Schiff Base

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Bulk solvent-free melt ring-opening polymerization of L-lactide catalyzed by Cu(II) and Cu(II)-Nd(III) complexes of the Salen-type Schiff-base ligand

Applied Organometallic Chemistry ◽

10.1002/aoc.1760 ◽

2011 ◽

Vol 25 (4) ◽

pp. 310-316 ◽

Cited By ~ 22

Author(s):

Lei-Lei Chen ◽

Li-Qin Ding ◽

Chu Zeng ◽

Yong Long ◽

Xing-Qiang Lü ◽

...

Keyword(s):

Schiff Base ◽

Schiff Base Ligand ◽

Ring Opening ◽

Ring Opening Polymerization ◽

Solvent Free

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SnCl4-catalyzed Solvent-free Acetolysis of 2,7-Anhydrosialic Acid Derivatives

10.3762/bxiv.2019.131.v1 ◽

2019 ◽

Author(s):

Kesatebrhan Haile Asressu ◽

Cheng-Chung Wang

Keyword(s):

Sialic Acid ◽

Lewis Acids ◽

Ring Opening ◽

Building Blocks ◽

Solvent Free ◽

Biologically Active ◽

Protecting Group ◽

Free Ring ◽

Ring Opening Reactions ◽

Acid Catalyzed

Sialic acid-containing glycans are found in different sialic acid forms and a variety of glycosidic linkages in biologically active glycoconjugates. Hence, the preparation of suitably protected sialyl building blocks requires high attention in order to access glycans in pure form. In this line, various C-5 substituted 2,7-anhydrosialic acid derivatives bearing both electron donating and withdrawing protecting groups were synthesized and subjected to different Lewis acid-catalyzed solvent free ring opening reactions at room temperature in the presence of acetic anhydride. Among the various Lewis acids tested, the desired acetolysized products were obtained in moderate yields under a tin(IV) chloride catalysis system. Our methodology can be extended to regioselective protecting group installation and manipulation towards a number of thiosialoside and halide donors.

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