Church, J. S. published the artcileLanasol dyes and wool fibers. Part II: Model studies on the mechanism of dye fixation in an aqueous system, Synthetic Route of 18791-02-1, the publication is Dyes and Pigments (1998), 39(4), 313-333, database is CAplus.
The mechanism of the fixation of Lanasol dyes to the various amino acid side chain sites within wool protein was investigated using model compounds in a mixed solvent system. As the dyeing of wool is generally carried out in an aqueous system at the boil it was felt that the model system would be more accurate if the compounds studied were water soluble The synthesis of the sulfonated version of the model reactive dye compound used in Part I and its subsequent reaction with model wool compds is reported. In addition, a model compound based on benzenesulfonic acid, and an actual com. Lanasol dye were also reacted. The reaction products were isolated by chromatog. and then characterized by proton and carbon-13 NMR, and electrospray mass spectroscopy. In general the results were consistent with those obtained from the study carried out in the acetone/water solvent system. The dibromo form of the dye reactive group is only converted to the monobromo form in the presence of model wool compounds and both forms react with model wool compounds to yield the same products. Amines reacted with the model dyes to form a product containing an aziridine ring, but no evidence for the proposed reaction of this ring with a second nucleophilic wool site to form a crosslink between 2 protein chain segments could be detected. In the few cases where an aziridine ring structure was not formed, the products obtained were found to support a Michael addition (1,4-addition) reaction mechanism. Unlike the results found for the mixed solvent system, the wool models for N-terminal groups did not react with the model dye compounds
Dyes and Pigments published new progress about 18791-02-1. 18791-02-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 2,3-Dibromopropionylchloride, and the molecular formula is C3H3Br2ClO, Synthetic Route of 18791-02-1.
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