Process for preparing N,N'-bis(hydrocarbyloxycarbonyl)-N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)diamines
申请人:CIBA-GEIGY AG
公开号:EP0546998B1
公开(公告)日:1994-11-23
Verwendung von Dipiperidin-di-carbamaten zum Stabilisieren von synthetischen Polymeren
申请人:CIBA-GEIGY S.p.A.
公开号:EP0124486B1
公开(公告)日:1987-02-25
US4695599A
申请人:——
公开号:US4695599A
公开(公告)日:1987-09-22
US5449779A
申请人:——
公开号:US5449779A
公开(公告)日:1995-09-12
Process for preparing
申请人:Ciba-Geigy Corporation
公开号:US05449779A1
公开(公告)日:1995-09-12
A process for preparing a compound of the formula (I) ##STR1## in which R.sub.1 is e.g. hydrogen, R.sub.2 is e.g. C.sub.2 -C.sub.12 alkylene and R.sub.3 is e.g. C.sub.1 -C.sub.18 alkyl; which process comprises reacting, in water, in the absence of an organic solvent, a compound of the formula (II) Cl--COOR.sub.3 (II) wherein R.sub.3 is as defined above with a compound of the formula (III) ##STR2## where R.sub.1 is e.g. as defined above and R.sub.2 ' is e.g. as defined above for R.sub.2, at a temperature of from 0.degree. to 60.degree. C., 1 to 1.5 mol of the compound of the formula (II) being used per mol --NH-- group in the compound of the formula (III); and neutralizing the hydrochloric acid formed with an inorganic base.