Ichihara, Osamu published the artcileDevelopment of self-indicating resin, Computed Properties of 92-36-4, the publication is Combinatorial Chemistry & High Throughput Screening (2007), 10(4), 261-267, database is CAplus and MEDLINE.
The development and application of self-indicating resins (SIR), materials which can indicate the presence or absence of amines in the reaction solution by the conspicuous color change of a phenolsulfophthalein type dye immobilized on resin beads has been reported. Although the functionality necessary for attaching the dye to the resins could be readily introduced by the Suzuki-Miyaura coupling during the synthesis of the SIR, this approach was only applicable to the dyes containing suitable functionality for the cross-coupling reaction. A new approach to immobilizing the indicating dyes onto the resin support is now reported. The dyes suitable for loading onto aminomethyl polystyrene (PS) resin were prepared by Friedel-Crafts reaction of 2-sulfoterephthalic anhydride with a wide range of phenols. Using this new route, polymer-supported dye I was readily prepared in >100g quantities. Use of I in the synthesis of a 144 member urea library was demonstrated and the SIR successfully indicated the endpoint of the reaction between amines and isocyanates.
Combinatorial Chemistry & High Throughput Screening published new progress about 92-36-4. 92-36-4 belongs to thiazole, auxiliary class Organic Pigment, name is 2-(4-Aminophenyl)-6-methylbenzothiazole, and the molecular formula is C14H12N2S, Computed Properties of 92-36-4.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica