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    • 21. 发明授权
    • Dihydroperimidine squarylium compound and mixture of dihydroperimidine
squarylium compounds
    • 二氢嘧啶方酸化合物和二氢嘧啶方酸化合物的混合物
    • US5959105A
    • 1999-09-28
    • US10121
    • 1998-01-21
    • Toru HaradaYoshiharu Yabuki
    • Toru HaradaYoshiharu Yabuki
    • G03C1/825C07D239/70C07D487/06C09B57/00C07D487/04C09B7/02
    • C07D487/06C07D239/70C09B57/007
    • A dihydroperimidine squarylium compound is represented by the formula (I): ##STR1## in which each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, R.sup.10, R.sup.11 and R.sup.12 independently is hydrogen, an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group or an acyl group; R.sup.1 and R.sup.2, R.sup.3 and R.sup.4, R.sup.5 and R.sup.6, R.sup.7 and R.sup.8, R.sup.9 and R.sup.10 or R.sup.11 and R.sup.12 may be combined with each other to form a five- or six-membered nitrogen-containing heterocyclic ring; R.sup.2 and R.sup.3, R.sup.6 and R.sup.7 or R.sup.10 and R.sup.11 may be combined with each other to form a five- or six-membered aliphatic ring; and n is an integer of 1 to 6. The specification further discloses a mixture of dihydroperimidine squarylium compounds, an infrared absorbing sheet and a silver halide photographic material.
    • 二氢嘧啶方酸鎓化合物由式(I)表示:其中R1,R2,R3,R4,R5,R6,R7,R8,R9,R10,R11和R12各自独立地为氢,烷基,环烷基 基团,芳基,芳烷基,烯基,炔基或酰基; R 1和R 2,R 3和R 4,R 5和R 6,R 7和R 8,R 9和R 10或R 11和R 12可以彼此结合形成五元或六元含氮杂环; R2和R3,R6和R7或R10和R11可以彼此结合形成五元或六元脂肪环; 并且n为1至6的整数。该说明书还公开了二氢嘧啶方酸化合物,红外线吸收片和卤化银照相材料的混合物。