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PROCESS FOR THE PREPARATION OF BLUE NAPHTHOSTYRIL CATIONIC DYES
PROCESS FOR THE PREPARATION OF BLUE NAPHTHOSTYRIL CATIONIC DYES
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机译:蓝色萘甲酚蓝阳离子染料的制备方法
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摘要
A process for the preparation of blue naphthostyril cationic dyes of the formula shown in Figure 1:(chemical formula)wherein R is H or CH 3, R 1 is phenyl or a naphthyl radical and R2 is methosulphate or a chloride radical which comprises reacting 1, 8-naphtholactam or a 1-methyl derivative thereof of the formula shown in Figure 2 :wherein R has the meanings stated above with a 1 morpholine derivative of the formula shown in Figure 3 :wherein R 1 has the meaning stated above, the reaction being effected in an organic solvent in the presence of phosphorous oxychloride and when 1, 8-naphtholactam is employed, further methylating the product with dimethyl sulphate.
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