N-hydroxypyridine-2(1H)-thione derivatives of carboxylic acids as activated esters. Part I. The synthesis of carboxamides
作者:Derek H.R. Barton、J. Albert Ferreira
DOI:10.1016/0040-4020(96)00487-5
日期:1996.7
The reaction between an acyl derivative of N-hydroxypyridine-2(1H)-thione (a Barton PTOC ester) and either an amine (primary or secondary), or the corresponding sulfenamide, led to the formation of a carboxamide in a clean transformation requiring minimal work-up and purification. The reaction with a sulfenamide is particularly useful since the only by-product, an unsymmetrical disulfide, is of both
Self-healing coatings for oil and gas applications
申请人:Chilukuri Anusha
公开号:US10316413B2
公开(公告)日:2019-06-11
A coated article comprises a substrate and a self-healing coating disposed on a surface of the substrate, the self-healing coating comprising a metallic matrix; and a plurality of micro- or nano-sized particles dispersed in the metallic matrix; the micro- or nano-sized particles comprising an active agent disposed in a carrier comprising a micro- or nano-sized metallic container, a layered structure, a porous structure, or a combination comprising at least one of the foregoing.