Abstract:
Unsaturated eicosanoic acids and derivatives thereof which inhibit the synthesis of SRS-A are useful for treating and preventing asthma and allergic responses caused by SRS-A as well as useful in inhibiting inflammation.
Abstract:
A base precursor for heat-developable photosensitive material is disclosed. The precursor is comprised of a compound represented by general formula (I) or (II):(R--C.tbd.C--CO.sub.2 H).sub.x.B (I)R--C.tbd.C--CO.sub.2 H).sub.2.B.sub.y (II)The substituents within the general formulae are defined within the specification. The use of this novel base precursor makes it possible to obtain a material which is very stable at normal temperatures and which smoothly decomposes under heating at 80.degree. C. or higher in order to release a basic constituent.
Abstract:
The invention relates to a process for preparing a propiolic acid or a derivative thereof by reacting a terminal alkyne with carbon dioxide, which comprises performing the reaction in the presence of a base and a copper complex, especially a copper (I) complex having at least one ligand, at least one of the ligands of the copper complex being selected from monodentate ligands which have an aminic or iminic nitrogen atom capable of coordination with copper, and polydentate ligands having at least two atoms or atom groups which are capable of simultaneous coordination with copper and are selected from nitrogen, oxygen, sulfur, phosphorus and carbene carbon.
Abstract:
A process for preparing alkynecarboxylic acids and alkyne alcohol esters of alkynecarboxylic acids, includes an oxidation reaction of an alkyne alcohol with from 1 to 10 molar equivalents of a hypohalite based on the number of functional groups to be oxidized in the presence of a nitroxyl compound at a pH of less than 7. There is also a partial oxidation reaction of the alkyne alcohol with from 0.5 to 5 molar equivalents of a hypohalite based on the number of functional groups to be oxidized in the presence of a nitroxyl compound at a pH of less than 7.
Abstract:
A heat-developable light-sensitive material comprising, on a support, a thermally decomposable organic silver salt. The heat-developable light-sensitive materials have high density and low fog.
Abstract:
Eicosa-5,8-diynoic acids and 2-fluoro-eicostrien-5-ynoic acid and esters thereof which inhibit the synthesis of SRS-A are useful for treating and preventing asthma and allergic responses caused by SRS-A as well as useful in inhibiting inflammation.
Abstract:
The invention relates to a process for preparing a propiolic acid or a derivative thereof by reacting a terminal alkyne with carbon dioxide, which comprises performing the reaction in the presence of a base and a copper complex, especially a copper (I) complex having at least one ligand, at least one of the ligands of the copper complex being selected from monodentate ligands which have an aminic or iminic nitrogen atom capable of coordination with copper, and polydentate ligands having at least two atoms or atom groups which are capable of simultaneous coordination with copper and are selected from nitrogen, oxygen, sulfur, phosphorus and carbene carbon.