Method for preparing magenta couplers having thioether groups

Details Method for preparing magenta couplers having thioether groups Method for preparing magenta couplers having thioether groups

1979-08-10

1981-10-06

Jiles, Henry R.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

548360, 548364, 548365, 548324, 548163, 548170, 548221, 548222, 548225, 548226, 548227, 548228, 548230, 548253, 548261, 548309, 548327, 548336, 548348, 544371, 546153, 546162, 546211, 546279, C07D41312, C07D40112, C07D40312, C07D23148

Patent

active

042936918

ABSTRACT:
A method for preparing image-forming color couplers containing a thioether group at the coupling active position is disclosed which comprises reacting a compound of the formula A-H where A is a cyan, magenta or yellow coupler residue in which a hydrogen atom at the coupling off position is removed with a disulfide of the formula (IIa) or (IIb): ##STR1## where R is a straight chain, branched chain or cyclic alkyl group, a cyclic alkenyl group, or an aralkyl group or a ##STR2## group, B is Y, -D-Y or ##STR3## where D is an oxygen atom or >N--R.sub.4, R.sub.4 is a hydrogen atom, an alkyl group or an aryl group, Y is a straight chain, branched chain or cyclic alkyl group, a straight chain, branched chain or cyclic alkenyl group, an aralkyl group, an aryl group, or a heterocyclic group, Q is a non-metallic atomic group necessary for completing a 5- or 6-membered nitrogen-containing heterocyclic group and R.sub.1, R.sub.2 and R.sub.3 each is a hydrogen atom, an alkyl group, a cycloalkyl group, or an aryl group, an R.sub.2 and R.sub.3 or R.sub.1 and R.sub.3 can combine to form a 5-, 6- or 7-membered nitrogen-containing heterocyclic ring, and X is a halogen atom.

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