EP 1025084 A1 20000809 - METHOD FOR PURIFYING 4-AMINO-PIPERIDINES
Title (en)
METHOD FOR PURIFYING 4-AMINO-PIPERIDINES
Title (de)
VERFAHREN ZUR REINIGUNG VON 4-AMINO-PIPERIDINEN
Title (fr)
PROCEDE DE PURIFICATION DE 4-AMINO-PIPERIDINES
Publication
Application
Priority
- DE 19743433 A 19971001
- EP 9806117 W 19980925
Abstract (en)
[origin: WO9916749A1] The invention relates to a method for purifying 2,2,6,6-tetrasubstituted 4-amino-piperidines produced from the corresponding piperidin-4-ones, and subsequent distillation. According to the invention, the distilled 2,2,6,6-tetrasubstituted 4-amino-piperidine is reacted with hydrogen in the presence of a hydrating or dehydrating catalyst and the 4-amino piperidine is then separated from the reaction mixture.
IPC 1-7
IPC 8 full level
C07D 211/58 (2006.01)
CPC (source: EP KR)
C07D 211/44 (2013.01 - KR); C07D 211/58 (2013.01 - EP KR)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IE IT LI NL PT
DOCDB simple family (publication)
WO 9916749 A1 19990408; AU 9746998 A 19990423; BR 9812595 A 20000801; CA 2305282 A1 19990408; CN 1272843 A 20001108; CO 4770994 A1 19990430; DE 19743433 C1 19990422; EP 1025084 A1 20000809; HU P0004584 A2 20010428; ID 23897 A 20000525; JP 2001518465 A 20011016; KR 20010030840 A 20010416; NZ 503565 A 20010928; PL 339578 A1 20001218; SK 4262000 A3 20001009; TW 377345 B 19991221
DOCDB simple family (application)
EP 9806117 W 19980925; AU 9746998 A 19980925; BR 9812595 A 19980925; CA 2305282 A 19980925; CN 98809761 A 19980925; CO 98056932 A 19980930; DE 19743433 A 19971001; EP 98951469 A 19980925; HU P0004584 A 19980925; ID 20000612 D 19980925; JP 2000513835 A 19980925; KR 20007003498 A 20000331; NZ 50356598 A 19980925; PL 33957898 A 19980925; SK 4262000 A 19980925; TW 87116216 A 19980930