摘要:
A novel medicament which is effective as an antihypertensive agent is proposed which contains, as its effective ingredient, an organosilicon compound represented by the general formulaR.sub.3 Si(CH.sub.2).sub.n COOH,where R denotes an alkyl group having from 1 to 6 carbon atoms and n is an integer from 1 to 5 inclusive, or a therapeutically acceptable salt thereof such as a salt with an alkali metal, e.g. sodium or potassium. The effectiveness of the compound, for example, 3-trimethylsilyl butyric acid as well as the sodium and potassium salts thereof is established by the animal test undertaken with hypertensive rats.
摘要:
The invention provides a novel anti-tumor agent highly effective for inhibiting growth of several tumor or cancer cells with low toxicity. The active ingredient contained in the anti-tumor agent is an .omega.-triorganosilyl-substituted linear alkanoic acid anilide which is a hitherto unknown novel compound prepared by the reaction of corresponding acid chloride and aniline.
摘要:
The invention provides a novel compound 2-(3-trimethylsilylpropyl)benzothiazole having remarkable anti-tumor effects or, in particular, inhibiting growth of melanoma cells in test animals. The compound is synthesized by the ring-closing intramolecular dehydration condensation of 2-mercapto-(.gamma.-trimethylsilyl)butyroanilide which in turn is obtained by the dehydrochlorination condensation of 2-aminothiophenol and .gamma.-trimethylsilylbutyryl chloride in a polar solvent in the presence of an acid acceptor.
摘要:
The invention provides a novel class of organosilicon compounds and a method for the preparation thereof as well as an anti-tumor agent containing the compound having very remarkable anti-tumor activity but with very low toxicity. The inventive compound is a (trihydrocarbylsilylmethyloxyimino)alkane, which is a silicon-containing oxime compound hitherto not described in any prior art literatures, represented by the general formula R.sup.1.sub.3 Si--CH.sub.2 --O--N.dbd.Y, R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having from 1 to 10 carbon atoms and Y is a divalent hydrocarbon group denoted by .dbd.CR.sup.2 R.sup.3 or .dbd.CR.sup.4, R.sup.2 and R.sup.3, which may be identical or different, having the same meaning as R.sup.1 defined above and R.sup.4 being an alkylene group to form a ring structure jointly with the carbon atom directly bonded to the nitrogen atom. Typical examples of the compounds are: 2-(trimethylsilylmethyloxyimino) butane, 2-(trimethylsilylmethyloxyimino)propane, 2-(dimethylphenylsilylmethyloxyimino) butane and trimethylsilylmethyloxyiminocyclohexane.
摘要:
The present invention presents a novel class of compounds bis(triorganosilylalkyl) phosphites, e.g. bis(trimethylsilylmethyl) phosphite. The compound is readily prepared by the reaction of a corresponding triorganosilyl alkanol with phosphorus trichloride or by the partial hydrolysis of a corresponding tris(triorganosilylalkyl) phosphite with an equimolar amount of water followed by distillation of the reaction mixture.The compound has a remarkable anti-transplanted tumor effectiveness as established by the test with mice as the test animals for preventing the growth of Ehrlich's cancer cells and Sarcoma 180 cells. The compound has very low toxicity when orally administrated.
摘要:
Halogenosilanes are prepared from an organohalogenosilane and an organopolysiloxane as the starting materials by subjecting them to an intermolecular redistribution reaction in the presence of a monohydrochloride of a hexaalkylphosphotriamide. The thus prepared halogenosilanes, which are different from the starting halogenosilane reactant, are very useful in the silicone industry.
摘要:
The invention provides a novel in-process release paper, i.e. a release paper used as a backing paper in the manufacturing of, e.g. a synthetic leather with a polyurethane resin. The releasing resin composition with which the release paper is coated is novel as comprising (a) a base resin selected from the group consisting of alkyd resins and acrylic resins modified with an organopolysiloxane, of which from 15 to 50% by moles of the organic groups directly bonded to the silicon atoms in a molecule are phenyl groups, having at least one hydroxy-substituted organic group directly bonded to the silicon atom in a molecule, (b) an alkanol-modified amino resin and (c) an acidic catalyst. The inventive in-process release paper is very superior to the conventional ones in the very much reduced peeling resistance, increased surface gloss and durability in repeated use.
摘要:
In the synthesis of organohalosilanes by the direct process of reacting an organic halogen with metallic silicon powder, a metallic copper catalyst in the form of a thermally active metallic copper powder having large strain energy is used.
摘要:
Organohalosilanes are prepared by the Rochow process of reacting metallic silicon particles with an organohalide in the presence of a copper catalyst. The metallic silicon particles, which are prepared by comminuting fragments of metallic silicon raw material, have a mean particle size of 10 &mgr;m to 10 mm and a surface oxygen quantity of up to 0.3 wt % which is given as the difference between the oxygen concentrations determined by in-metal oxygen analysis of the metallic silicon particles and the fragments, respectively.
摘要:
Novel 1,1,2,2-tetramethylpropylperoxy esters are provided. They are useful as a polymerization initiator in polymerizing vinyl chloride, vinylidene chloride and vinyl acetate monomers, with the advantage of completing polymerization within a short time.