Organic compounds -- part of the class 532-570 series – Organic compounds – Azo
Patent
1994-06-07
1995-01-17
Ramsuer, Robert W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Azo
534851, 534860, 534875, C09B 29085
Patent
active
053826590
ABSTRACT:
The invention relates to novel aromatic acids, 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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Ciba-Geigy Corp.
Fishman Irving M.
Kaiser Karen G.
Powers Fiona T.
Ramsuer Robert W.
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