| 摘要 |
<p>1432600 Piperidine derivatives E I DU PONT DE NEMOURS & CO 20 Sept 1973 [20 Sept 1972] 44253/73 Heading C2C [Also in Divisions C3 and D1] 1,2,2,6,6 - Pentamethyl - 4 - hydroxypiperidine is prepared from 2,2,6,6,-tetramethyl - 4 - hydroxypiperidine and aqueous formaldehyde solution. 1(2 - Hydroxyethyl) - 2,2,6,6 - tetramethyl- 4-hydroxy-piperidine is prepared from ethylene oxide and 2,2,6,6-tetramethyl-4-hydroxypiperidine. The dimethyl ester of 5-[(1,2,2,6,6-pentamethyl - 4 - piperidinyl)sulphamoyl]isophthalic acid is prepared by reacting 3,5-dicarbomethoxy-benzenesulphonyl chloride with 4- amino-1,2,2,6,6-pentamethyl piperidine. The dimethyl ester of [(2,2,6-tetramethyl- 4 - piperidinyl)sulphamoyl]fluorene- 9,9 -dipropionic acid is prepared by reacting 9,9- dicarbomethoxyethyl fluorenyl sulphonyl chloride with 4 - amino - 2,2,6,6 - tetramethylpiperidine. The methyl ester of N-(2,2,6,6-tetramethyl-4- piperidinyl)terephthalmic acid is prepared from p-carbomethoxybenzoyl chloride and 4- amino-2,2,6,6-tetramethyl-piperidine. 2,2<SP>1</SP>- [4,6 - Bis([2,2,6,6-tetramethyl - 4- piperidinyl]amino) - s - triazine - 2 - ylimino]- diethanol is prepared from 2,4-dichloro-6-N-di- (2-hydroxyethyl)amino-s-triazine and 4-amino- 2,2,6,6-tetra-methylpiperidine.</p> |
