Compounds containing a group of the formula I ##STR1## in which R is H or C.sub.1 -C.sub.4 -alkyl, R.sup.1 is H, CN, an acyloxy group or a free valency and R.sup.2 and R.sup.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.sup.2 --NH--R.sup.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.
含有公式I(##STR1##)的化合物的R是H或C.sub.1-C.sub.4-烷基,R.sup.1是H,CN,一个酰氧基团或一个自由价,R.sup.2和R.sup.3是有机基团,可以通过与
光气(phosgene)和次级胺R.sup.2 --NH--R.sup.3以摩尔量的碱存在下逐步反应,从相应的含有公式Ia(##STR2##)的化合物中以简单方式制备。含有I基团的N-二有机碳酰胺化合物是杰出的
光稳定剂,特别是对于有机聚合物。它们可以通过次级反应转化为其他含有I基团的化合物,这些化合物通过直接
光气化无法获得。通过
光气化或转化获得的许多产品都是新颖的化合物。