Process for the preparation of 1-diorganocarbamoyl-polyalkylpipe

Details Process for the preparation of 1-diorganocarbamoyl-polyalkylpipe Process for the preparation of 1-diorganocarbamoyl-polyalkylpipe

1983-05-02

1986-05-20

Kight, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544212, 544218, 544230, 546 15, 546186, 546187, 546188, 546189, 546192, 546207, C07D21110, C07D21194, C07D41306, C07D41312

Patent

active

045902682

ABSTRACT:
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.

REFERENCES:
patent: 3904602 (1975-09-01), Somlo
patent: 4021432 (1977-05-01), Holt et al.
patent: 4412021 (1983-10-01), Karrer
patent: 4432985 (1984-02-01), Nadzan et al.
Chemical Abstracts 75: 5609, 1971.
Chemical Abstracts 100: 104519, 1984.

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