Parallel Synthesis of Ureas and Carbamates from Amines and CO<sub>2</sub> under Mild Conditions
作者:Scott L. Peterson、Sabrina M. Stucka、Christopher J. Dinsmore
DOI:10.1021/ol100259j
日期:2010.3.19
A mild and efficient library synthesis technique has been developed for the synthesis of ureas and carbamatesfrom carbamic acids derived from the DBU-catalyzed reaction of amines and gaseous carbondioxide. Carbamic acids derived from primary amines reacted with Mitsunobu reagents to generate isocyanates in situ which were condensed with primary and secondaryamines to afford the desired ureas. Similarly
Use of a copolymer having at least one grafted alkoxy or hydroxy polyalkylene glycol function, as agent improving the activation of optical brightness and the products obtained
申请人:Dupont Francois
公开号:US20060106186A1
公开(公告)日:2006-05-18
The invention relates to a water-soluble copolymer having at least one alkoxy or hydroxyl polyalkylene glycol function grafted onto at least one ethylenically unsaturated monomer, as an agent to improve the activation of the optical brightness of the end product, in the fields of paper, textile, detergents and paint.