Lysine-n-amino reactive and cysteine-mercapto reactive azo dyes

Details Lysine-n-amino reactive and cysteine-mercapto reactive azo dyes Lysine-n-amino reactive and cysteine-mercapto reactive azo dyes

1991-09-11

1993-07-20

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534591, 534593, 534728, 534845, 534851, 534887, 436 86, 436 90, C09B 29085, G01N 3368

Patent

active

052295036

ABSTRACT:
The invention relates to azo compounds, especially to compounds of formula ##STR1## wherein R.sub.1 is lower alkyl, R.sub.2 is lower alkyl, R.sub.3 is hydrogen, carboxy or sulfo, R.sub.4 is carboxy or sulfo, G is an unsubstituted or substituted 1,4-phenylene group or an unsubstituted or substituted 1,4-naphthylene group, and wherein either R.sub.5 and R.sub.6 together are an additional bond and L is an oxygen or sulfur atom or wherein R.sub.5 is hydrogen, R.sub.6 is halomethyl and L is an oxygen atom, and salts thereof, to the use of compounds I and their salts, to a process for the preparation of compounds I and their salts, to starting materials used in that preparation process, and salts thereof, to a process for the preparation of those starting materials and their salts, to a device in which the compounds I and their salts are used, and to a process in which that device is used. The compounds of formula I can be used as adjuncts in the investigation of proteins and can be prepared in a manner known per se.

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