RAMADAS S. R.; SRINIVASAN P. S., J. PRAKT. CHEM., 1977, 319, NO 1, 169-173
作者:RAMADAS S. R.、 SRINIVASAN P. S.
DOI:——
日期:——
RAMADAS S. R.; SRINIVASAN P. S., INDIAN J. CHEM. <IJOC-AP>, 1976, B 14, NO 10, 794-795
作者:RAMADAS S. R.、 SRINIVASAN P. S.
DOI:——
日期:——
[EN] FUNCTIONALIZED CELLULOSE NANOCRYSTALS, A METHOD FOR THE PREPARATION THEREOF AND USE OF FUNCTIONALIZED CELLULOSE NANOCRYSTALS IN COMPOSITES AND FOR GRAFTING<br/>[FR] NANOCRISTAUX DE CELLULOSE FONCTIONNALISÉS, LEUR PROCÉDÉ DE PRÉPARATION ET UTILISATION DE NANOCRISTAUX DE CELLULOSE FONCTIONNALISÉS DANS DES COMPOSITES ET POUR LE GREFFAGE
申请人:SWETREE TECHNOLOGIES AB
公开号:WO2014070092A1
公开(公告)日:2014-05-08
The present invention relates to a cellulose nanocrystal functionalized with a group R, a method for preparation of cellulose nanocrystals that are functionalized with one or more groups R and use of functionalized cellulose nanocrystals in composites and for grafting. The aim of the invention is to offer more rapid and simplified methods to generate functional CNC with high degree of reactive groups on the surface. Furthermore, there is a need for functional CNCs with groups on the surface that can be used in composite materials and where the reactive group can work as coupling agents, initiators for polymer grafting or as crosslinkers. This is achieved by a method for preparation of cellulose nanocrystals that are functionalized with one or more groups R, wherein the method comprises the steps of: a) providing cellulose; b) treating the cellulose with an acidic water solution; c) removing the acidic water solution; d) adding a solution comprising an organic acid; e) reacting the mixture obtained in step d).
Lewis Base Catalyzed Synthesis of Sulfur Heterocycles via the C1‐Pyridinium Enolate
作者:Simon Cromwell、Randy Sutio、Changhe Zhang、Georgina K. Such、David W. Lupton
DOI:10.1002/anie.202206647
日期:2022.8.15
Thiocarbonyl-containing compounds undergo reactions with C1-Lewis base enolates to give sulfur heterocycles. Specifically, dimethylaminopyridine (DMAP) catalyses the cyclisation of dithioesters, trithiocarbonates and xanthates to give an array of sulfur heterocycles. The transformation demonstrates the viability of thiocarbonyl-containing functionality in Lewis base organocatalysis, and defines a new