Herein, we describe a zinc‐catalysed N2‐selective olefination of benzotriazoles with unactivated alkenes and styrenes. The transformation is achieved by a N‐iodosuccinimide (NIS)‐mediated two‐step, one‐pot approach, proceeding through sequential regioselective β‐iodoalkylation of benzotriazoles with alkenes and a subsequent base‐promoted 1,2‐elimination. The N2‐selective β‐iodoalkylation of benzotriazoles
Heat-developable silver halide color photographic light-sensitive material and image-forming method using the same
申请人:——
公开号:US20020177088A1
公开(公告)日:2002-11-28
A heat-developable silver halide color photographic light-sensitive material, which has a support and contains, on the support, a photosensitive silver halide, an organosilver salt, a developing agent, and a coupler that is capable of forming a dye upon a coupling reaction with an oxidized developing agent,
wherein the light-sensitive material satisfies the following condition:
(A) that the support is a plastic film whose glass transition temperature is from 120° C. to 350° C.; and/or
(B) that the light-sensitive material contains a hydrophilic binder on the support, and a non-light-sensitive layer containing a hydrophilic binder is provided on the side opposite to a light-sensitive layer side, with the support being between the layers, and the light-sensitive layer contains the photosensitive silver halide.
Heat-developable light-sensitive material and image-forming method using the same
申请人:——
公开号:US20020110763A1
公开(公告)日:2002-08-15
A heat-developable light-sensitive material, which at least contains:
(a) a photosensitive silver halide;
(b) a reducible silver salt;
(c) a dispersion of fine crystalline particles of a color-developing agent;
(d) a dispersion of fine crystalline particles of a coupler capable of reacting with an oxidized product of the color-developing agent, to form a dye;
(e) a dispersion of fine crystalline particles of a thermal solvent; and
(f) a binder,
each of which is contained on the same side of a support. An image-forming method, which utilizes the heat-developable light-sensitive material.
Silver halide photosensitive material and image-forming method using same
申请人:Miyake Kiyoteru
公开号:US06890705B2
公开(公告)日:2005-05-10
The second silver halide photosensitive material comprises a substrate and at least one photosensitive silver halide emulsion layer formed thereon, the silver halide photosensitive material comprising at least two types of silver halide grains with different projected areas having photosensitivity in the same spectral range; silver halide grains having a larger projected area having a refractive index n1 and an average thickness a, and silver halide grains having a smaller projected area having a refractive index n2 and an average thickness b; and the silver halide grains satisfying the conditions defined by the following equation (1):
n2≦n1, and
a≦b×
(
n
2/
n
1) (1).