C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/249, 260/278
C07D 211/04 (2006.01) C07D 211/46 (2006.01) C07D 211/58 (2006.01) C07D 211/66 (2006.01) C07D 211/74 (2006.01) C07D 295/215 (2006.01) C07D 471/10 (2006.01) C07D 491/10 (2006.01) C08K 5/21 (2006.01) C08K 5/3435 (2006.01)
Patent
CA 1236101
Case 3-13913/S/+ Process for the preparation of 1-diorganocarbamoyl-polyalkylpiperdines Abstract Compounds containing a group of the formula I Image in which R is H or c1-c4-alkyl, R1 is H, CN, an acyloxy group or a free valency and R2 and R3 are organic radiclLs can be prepared in a simpLe manner from the corresponding compounds containing a group of the formula Ia Image by stepwise reaction with phosgene and a secondary amine R2-NH-R3 in the presence of a molar amount of a base. The N-diorganocarbamoyl compounds containing the group I are outstanding light stabilisers, 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.
427667
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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