Abstract Compounds containing a group of the formula I ##STR1## in which R is H or C 1 -C 4 -alkyl, R 1 is H, CN, an acyloxy group or a free valency and R 2 and R 3 are organic radicals can be prepared in a simple manner from the corresponding compounds containing a group of the formula Ia ##STR2## by stepwise reaction with phosgene and a secondary amine R 2 --NH--R 3 in the presence of a molar amount of a base. The N-diorganocarbamoyl compounds containing the group I are outstanding light stabilizers, in particular for organic polymers. They can be converted by secondary reactions into other compounds which contain the group I and which are not accessible by direct phosgenation. Many of the products thus obtainable by phosgenation or conversion are novel compounds.
A compound of the formula VI ##STR37## wherein R is hydrogen; R 2 and R 3 independently are C 1 -C 18 -alkyl; or R 2 and R 3 , together with the Natom to which they are bonded, form a piperidine, pyrrolidine, morpholine, or 4-alkylpiperidine ring; and R 5 is a divalent acyl radical of an aliphatic or cycloaliphatic dicarboxylic acid.
Claim 2
Dependent Claim
62 words
A compound of the formula VI ##STR37## wherein R is hydrogen; R 2 and R 3 independently are C 1 -C 18 -alkyl; or R 2 and R 3 , together with the Natom to which they are bonded, form a piperidine, pyrrolidine, morpholine, or 4-alkylpiperidine ring; and R 5 is a divalent acyl radical of an aliphatic or cycloaliphatic dicarboxylic acid.