专利号:US-5144015-A 优先权日:1990-12-21 标 题 :Synthesis of pyrazole dyes 发明人:CHAPMAN DEREK D 权利人:EASTMAN KODAK CO 摘要:A process for preparing a 1-alkyl-3-secondary or tertiary alkyl-4-cyano-pyrazol-5-yl azo dye or a 1-alkyl-3-aryl-4-cyano-pyrazol-5-yl azo dye comprising: n a) reacting a 3-secondary or tertiary alkyl-4-cyano-5-amino pyrazole or a 3-aryl-4-cyano-5-amino pyrazole with a diazotizing reagent to form a pyrazol-5-yl diazonium salt; n b) allowing said diazonium salt to react with an aromatic coupling component to form a 3-secondary or tertiary alkyl-4-cyano-pyrazol-5-yl azo dye or a 3-aryl-4-cyano-pyrazol-5-yl azo dye; and n c) reacting the product of step b) with an aklylating agent in the presence of a base to form a 1-alkyl-3-secondary or tertiary alkyl-4-cyano-pyrazol-5-yl azo dye or a 1-alkyl-3-aryl-4-cyano-pyrazol-5-yl azo dye.
专利号:EP-0492444-B1 优先权日:1990-12-21 标 题 :Novel synthesis of pyrazole dyes
专利号:EP-0492444-A1 优先权日:1990-12-21 标题 :Novel synthesis of pyrazole dyes
参考文献:10.1007/s12221-008-0024-2 摘要:Koh J, Kim H, Park J. Synthesis and spectral properties of phthalimide based alkali-clearable azo disperse dyes. Fibers and Polymers. 2008 Apr;9(2):143–51. doi: 10.1007/s12221-008-0024-2.