公开(公告)号：EP0189772A3

公开(公告)日：1988-11-17

申请号：EP86100348

申请日：1986-01-13

申请人： BAYER AG

发明人： Steinbeck, Werner, Dr. ,  Stawitz, Josef Walter, Dr.

IPC分类号： C09B01/40 ,  C09B01/42 ,  C09B01/516

CPC分类号： C09B1/516 ,  C09B1/405 ,  C09B1/42

公开(公告)号：EP0236262A3

公开(公告)日：1988-11-02

申请号：EP87810039

申请日：1987-01-23

申请人： CIBA-GEIGY AG

发明人： Adam, Jean-Marie Dr.

IPC分类号： C09B01/20 ,  C09B01/40 ,  C09B01/42 ,  C09B01/50 ,  C09B01/54 ,  D06P03/60

CPC分类号： C09B1/22 ,  C09B1/26 ,  C09B1/40 ,  C09B1/42 ,  C09B1/50 ,  C09B1/54

公开(公告)号：EP0173404A3

公开(公告)日：1986-06-11

申请号：EP85201350

申请日：1985-08-23

申请人： POLAROID CORPORATION

发明人： Simon, Myron S. ,  Waller, David P.

IPC分类号： G03C05/54 ,  C09B01/40 ,  C09B01/28

CPC分类号： C09B1/28 ,  C09B1/40 ,  G03C8/10 ,  Y10S430/159

摘要： Photographic products and processes for the imagewise generation of a dye from a color shifted dye precursor of a preformed image dye, said precursor having at least one
group, wherein R is hydrogen, alkyl, provided that the a-carbon does not have a hydrogen atom attached thereto, aryl such as phenyl or substituted phenyl, e.g. p-nitrophenyl, or heterocyclic such as pyridine; R 1 -R 6 are hydrogen, alkyl, preferably having from 1 to 6 carbon atoms, or aryl; n is 0 or 1; and T is a moiety containing a thiazolidin-2-yl group which upon silver-assisted cleavage of said thiazolidin-2-yl group results in the formation of a
group, which may be protonated under the reaction conditions, followed by cleavage of said
cleavage is anchimerically assisted or accelerated by said
to provide after protonation, an
group in a dye chromophore. In a preferred embodiment the precursor is a substantially colorless compound.