METHOD FOR MANUFACTURING OPTICALLY ACTIVE COMPOUND
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20170022162A1
公开(公告)日:2017-01-26
The present invention provides a method for manufacturing an optically active compound of formula (2), which contains bringing hydrogen into contact with a compound of formula (1) in the presence of a transition metal catalyst having an optically active ligand. In the formula, R
1
represents a hydrogen atom or an acetyl group, R
2
, R
3
, R
4
, and R
5
each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group, an amino group, or an acyl group, R
6
represents an alkyl group, R
7
and R
8
each independently represents a hydrogen atom or an alkyl group, and a carbon atom marked with an asterisk (*) represents an asymmetric carbon atom.
Cationic enamine dyestuffs of the general formula ##STR1## in which the symbols have the meaning given in the description, are used for dyeing natural and synthetic substrates and compositions which can be dyed with cationic dyestuffs, in particular paper.
Kationische Enaminfarbstoffe, ihre Herstellung und Verwendung
申请人:BAYER AG
公开号:EP0131749A2
公开(公告)日:1985-01-23
Kationische Enaminfarbstoffe der allgemeinen Formel
in welcher die Symbole die in der Beschreibung genannte Bedeutung haben, werden zur Färben von natürlichen und synthetischen kationisch anfärbbaren Substraten und Massen, insbesondere Papier verwendet.
Method for preparing substituted 4-aminoindane derivatives
申请人:Bayer Aktiengesellschaft
公开号:US11180441B2
公开(公告)日:2021-11-23
The present invention relates to a method for preparing substituted 4-aminoindane derivatives of the general formula (I)
by rearrangement of compounds of the formula (II) in HF, wherein R1, R2, R3, R4, and R5 have the definitions as specified in the description.