公开(公告)号：US6015657A

公开(公告)日：2000-01-18

申请号：US179473

申请日：1994-01-10

申请人： Sundram Krishnamurthy ,  Michael William Crawley ,  David Scott Bailey ,  John Lawrence Pawlak

发明人： Sundram Krishnamurthy ,  Michael William Crawley ,  David Scott Bailey ,  John Lawrence Pawlak

IPC分类号： C07D231/52 ,  G03C7/24 ,  G03C7/30 ,  G03C7/305 ,  G03C7/384 ,  G03C1/73

CPC分类号： C07D231/52 ,  G03C7/3012 ,  G03C7/30529 ,  G03C7/384 ,  G03C7/24

摘要： A photographic element contains at least one photosensitive silver halide emulsion layer having associated therewith a 5-pyrazolone photographic coupler represented by the formula: ##STR1## wherein substituents X.sub.1, X.sub.2, Y, G.sub.1, G.sub.2, G.sub.3, Z, and R.sub.1 may be as specified in the specification; a, b, and c are individually integers form 0 to 3 provided that "a" cannot be an integer which, combined with the selection of X.sub.1 and X.sub.2, allows the number of chloride substituents on the ring containing G.sub.1 to exceed 3; and the sum of the Hammett's sigma values for X.sub.1, X.sub.2, Y, G.sub.1, G.sub.2, and G.sub.3 is at least 1.3.

摘要翻译： 照相元件含有至少一个感光卤化银乳剂层，其具有下式所示的5-吡唑啉酮照相成色剂：其中取代基X1，X2，Y，G1，G2，G3，Z和R1可以如 规范; a，b和c分别为0至3的整数，条件是“a”不能是与X1和X2的选择相结合的整数，允许含有G1的环上的氯取代数多于3; X1，X2，Y，G1，G2，G3的哈米特Σ值之和至少为1.3。