EP 0005475 B1 19810722 - PROCESS FOR THE PREPARATION OF 4,4'-DIAMINOBENZHYDROL AND ITS SUBSTITUTION PRODUCTS
Title (en)
PROCESS FOR THE PREPARATION OF 4,4'-DIAMINOBENZHYDROL AND ITS SUBSTITUTION PRODUCTS
Publication
Application
Priority
DE 2820485 A 19780510
Abstract (en)
[origin: EP0005475A1] 1. Process for the preparation of 4,4'-diamonobenzhydrol and its substitution products of the general formula see diagramm : EP0005475,P6,F1 where in A and B independently of one another represent an optionally substituted 1,4-arylene radical and R1 , R2 , R3 and R4 independently of one another represent hydrogen or an optionally substituted alkyl, cycloalkyl, aralkyl or aryl radical, or R1 and R2 , and R3 and R4 together with the adjacent nitrogen atom, form a heterocyclic ring, or one or more of the radicals R1 , R2 , R3 and R4 , with the adjacent nitrogen atom and an adjacent carbon atom of the radical A or B, form a heterocyclic ring, characterised in that 4,4'-diaminobenzophenones of the general formula see diagramm : EP0005475,P6,F2 are reduced in an organic solvent with the aid of an alkali metal borohydride in the presence of an alkali metal hydroxide.
IPC 1-7
IPC 8 full level
C07C 213/00 (2006.01); B41M 5/136 (2006.01); C07C 67/00 (2006.01); C07C 215/68 (2006.01); C07C 313/00 (2006.01); C07C 315/00 (2006.01); C07C 317/28 (2006.01); C07C 317/30 (2006.01); C07C 317/32 (2006.01)
CPC (source: EP)
B41M 5/136 (2013.01)
Designated contracting state (EPC)
CH DE FR GB IT
DOCDB simple family (publication)
EP 0005475 A1 19791128; EP 0005475 B1 19810722; BR 7902841 A 19791127; DE 2820485 A1 19791115; DE 2960507 D1 19811029; JP S55374 A 19800105
DOCDB simple family (application)
EP 79101294 A 19790430; BR 7902841 A 19790509; DE 2820485 A 19780510; DE 2960507 T 19790430; JP 5536879 A 19790508