摘要:
A silver halide color light-sensitive material containing a coupler represented by formula (I): ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl group; R.sub.2 and R.sub.3, same or different, each represent a group capable of substituting a benzene ring; Y represents a halogen atom, an alkoxy group, an alkoxycarbonyl group, a substituted or unsubstituted alkyl group, an alkylthio group, an aryloxy group, an alkylsulfonyl group, an arylthio group, or a carbamoyl group; X represents an organic residue necessary to form a substituted or unsubstituted 5- or 6-membered nitrogen-containing heterocyclic ring together with the nitrogen atom; l represents 0 or an integer of from 1 to 5; and m represents 0 or an integer of from 1 to 4.The coupler of formula (I) is excellent in dye image stability.
摘要:
The present invention provides an industrially very advantageous process for producing prostaglandins E.sub.1 with fewer steps and in higher yield. The process comprises reacting a 7-hydroxyprostaglandin E with a reactive derivative of an organic sulfonic acid in the presence of a basic compound to form the corresponding 7-organic sulfonyloxyprostaglandin E, treating the resulting 7-organic sulfonyloxyprostaglandin E, after or without isolation, in the presence of a basic compound to form a .DELTA..sup.7 -prostaglandin E, thereafter selectively reducing the carbon-carbon unsaturated bond existing on the .alpha.-chain. Some of the 7-hydroxyprostaglandins E and .DELTA..sup.7 -prostaglandins E used in the process are novel compounds.
摘要:
A photographic element comprising a support and at least one silver halide emulsion layer. The photographic element contains at least one layer containing at least one of the dyes represented by the following formula (I), (II), (III), (IV), (V), (VI), (VII) or (VIII): ##STR1## wherein Z.sub.1 to Z.sub.10 ; R.sub.1 to R.sub.24 ; L.sub.1 to L.sub.18 ; Y.sub.1 to Y.sub.8 ; Q.sub.1 to Q.sub.4 ; X.sub.1 to X.sub.3 ; Ar; h, m, p and r; and t.sub.1 to t.sub.3 are described in the specification.