发明名称 |
Method of making dihydroperimidine squaraine compounds |
摘要 |
<p>A method to make squaraine dyes involves the reaction of 1,8-diaminonaphthalene with 1,3-dihydroxyacetone dimer in a first reaction mixture comprising the appropriate solvents to prepare a first intermediate. This first intermediate is then reacted with an organic acylating agent in the presence of a suitable solvent to form a second intermediate. Lastly, after isolation, the second intermediate is reacted with squaric acid in a particular hydroxylic solvent/nonpolar solvent mixture that dissolves squaric acid and forms a ternary azeotrope with water and the water is at least partially removed. The resulting dyes have the following general structure wherein R is an organic radical derived from the organic acylating agent.
<Chemistry id="chema01" num="0001"><Image id="ia01" he="58" wi="101" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry></p> |
申请公布号 |
EP1191023(A1) |
申请公布日期 |
2002.03.27 |
申请号 |
EP20010203395 |
申请日期 |
2001.09.10 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
RAMSDEN, WILLIAM D.;VALENTE, LOUIS FRANCIS;BERNARD, LORI S. |
分类号 |
C07D239/70;C07D319/06;C09B23/00;C09B57/00;(IPC1-7):C07D239/70 |
主分类号 |
C07D239/70 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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