AbstractWe describe here a convenient and mild, carbon monoxide gas‐free palladium‐catalyzed procedure to obtain N‐substituted phthalimides with molybdenum hexacarbonyl as carbon monoxide precursor. These conditions tolerate a number of functional groups on the benzene ring as well as a number of amines and give the corresponding phthalimides in good to excellent yields.magnified image
Synthesis of aryl N-acylurea from aryl isocyanates or aryl carbodiimides for use as intermediate in novel sequential self-repetitive reaction (SSRR) to form amides, amide-imides and their polymers
申请人:Dai Shenghong A.
公开号:US20070282078A1
公开(公告)日:2007-12-06
Disclosed is a process for synthesizing an aryl N-acylurea in both high selectivity and high yield, comprising reacting an aryl carbodiimide with a carboxylic acid under mild conditions. Thermolysis of N-acylureas at above about 120° C. gives amides and isocyanates, and the latter will undergo the repetitive reaction sequences in the presence of a carbodiimide catalyst. Based on this unique model, a sequential self-repetitive reaction (SSRR) is also developed in a versatile manner for converting aryl carbodiimides into amides, polyamides, polyamide-imides and polyamide-imide elastomers.