2,3,8,9-Dibenzo-5,6-(substituted)benzo-1,4-dithio-7-azacyclonona-2,5,8-trienes. Synthesis and mechanistic study
作者:Kyongtae Kim、Man Nyoung Kim
DOI:10.1002/jhet.5570340101
日期:1997.1
5-(2-Acetamidoaryl)thianthreniumyl perchlorates reacted with potassium hydroxide in methanol at reflux giving 2,3,8,9-dibenzo-5,6-(substituted)benzo-1,4-dithio-7-azacyclonona-2,5,8-trienes 4 in 43 to 75% yields, whereas the reactions of the same compounds with sodium hydride in the absence or in the presence of dimethyl sulfate in refluxing tetrahydrofuran gave N-acetylated and N-methylated 4 in 68
INTRAMOLECULAR C-H AMINATION WITH PHOSPHORYL AZIDES
申请人:Zhang X. Peter
公开号:US20110207956A1
公开(公告)日:2011-08-25
A highly effective Co(II)-based system has been developed for catalytic intramolecular C—H amination with phosphoryl azides without the need of terminal oxidant or other additives, resulting in the high-yielding production of cyclophosphoramidates with nitrogen gas as the by-product; additional features of this new catalytic system include the amination of primary C—H bonds and formation of 7-membered ring structures.
FLEXIBLE POLYAMINES, FLEXIBLE AMINE-TERMINATED ADDUCTS, COMPOSITIONS THEREOF AND METHODS OF USE
申请人:PRC-DeSoto International, Inc.
公开号:US20140295088A1
公开(公告)日:2014-10-02
Disclosed are flexible polyamines, flexible amine-terminated polyformal adducts, flexible-amine-terminated polythioether adducts, compositions comprising flexible polyamines and isocyanate-terminated prepolymers, and compositions comprising flexible amine-terminated adducts and isocyanate-terminated prepolymers. Uses of the compositions as sealants, and particularly as aerospace sealants, are also disclosed.