摘要 |
A compound of Formula (1) and salts thereof, wherein: A is a substituted phenyl group carrying a group of the formula -NR<3>R<4> and an ortho group selected from sulpho, phosphonato and phosphinato; n is 0 or 1; L<1> and L<2> are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or L<1> and L<2> together with the N atom to which they are attached form an optionally substituted 5- or 6- membered ring; R<1> and R<2> are each independently optionally substituted alkyl or optionally substituted alkoxy; and R<3> and R<4> are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or R<3> and R<4> together with the nitrogen atom to which they are attached form an optionally substituted 5- or 6- membered ring; or R<3> is H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl and R<4> is an acyl group. The use of these compounds in inks and the use of inks comprising these compounds in ink jet printing.
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