摘要:
A process for preparing benzene derivatives having an isocyanatomethyl group by reacting a benzene derivative having a chloromethyl group with sodium cyanate in dimethylformamide at 60.degree. to 160.degree.C., in the presence of a catalytic amount of an acidic metal chloride-dimethylformamide compound, made present in the reaction mixture from the start of the reaction by being dissolved in the starting reaction mixture.
摘要:
Isocyanic acid derivatives are prepared by reacting an organic halogen compound with an alkali cyanate in N,N-disubstituted organic acid amides, N,N-disubstituted sulfonic acid amides, sulfoxides, sulfones or macrocyclic polyethers, at 70.degree. to 200.degree. C, in the presence of organic polyhalogen compounds selected from compounds having dihalogenomethyl group, dihalogenomethylene group, or trihalogenomethyl group and tetrahalogenomethane, in an amount in the range of from 1 to 20 weight percent based on the weight of said organic halogen compounds.
摘要:
A process for preparing organic isocyanate compounds characterized by reacting a chloromethyl group-containing compound having the formula:(X).sub.n RCH.sub.2 Clwherein X, which can be the same or different, is chlorine, alkyl, cycloalkyl, alkenyl, phenyl, chloromethylphenyl or chloromethyl, n is 0 or an integer of 1 to 3, and R is an aromatic hydrocarbon radical or an olefin radical,With an alkali cyanate, in the presence of a catalyst composition comprising (a) a cuprous salt in an amount of 0.1 to 20% by weight, based on said chloromethyl group-containing compound, and (b) a tertiary amine compound or quaternary ammonium compound in an amount equivalent to 0.05 to 1.25 gram atoms of nitrogen per gram mole of said cuprous salt, in a high-boiling-point solvent having a dieelectric constant (.epsilon.) not higher than 20, at a reaction temperature of 150.degree. to 250.degree. C, for 0.1 to 10 hours.
摘要:
Isocyanuric acid triesters are prepared by isomerization of the corresponding cyanuric acid triesters. The starting cyanuric acid esters are dissolved in a polar solvent which is free of active hydrogen atoms, which contains a nitrogen or sulfur atom in the molecule and which has a boiling point not higher than 260.degree. C. The solution may optionally contain an alkali metal halide, an alkaline earth metal halide or an ammonium halide. Isomerization is carried out at a temperature of from 50.degree. to 200.degree. C.
摘要:
Disclosed herein is a novel 2,3-dialkoxypropyl glyceryl ether and the preparation process for it. The above diglycerin dialkyl ether is readily prepared with high yield and purity by reacting its corresponding glycidyl ether with a protected glycerin to form a 1,3-dioxolan compound, followed by etherifying the thus formed 1,3-dioxolan compound into a dialkyl ether dioxolan compound, and then hydrolyzing the resultant dialkyl ether dioxolan compound. This diglycerin dialkyl ether is useful as an emulsifier, cleaner etc., and is preferably used as a component of cosmetic compositions. A cosmetic composition comprising the above 2,3-dialkoxypropyl glyceryl ether is also disclosed.
摘要:
Some 4-(2'-hydroxy-3'-alkoxy)propoxymethyl-1,3-dioxolanes are prepared by reacting alkylglycidyl ethers with acetal or ketal derivatives of glycerol in the presence of an acidic or basic catalyst. Also disclosed is a process for preparing certain 2-hydroxy-3-alkoxy-propylglyceryl ethers, which process comprises subjecting the 4-(2'-hydroxy-3'-alkoxy)propoxymethyl-1,3-dioxolanes to hydrolysis. The above processes can afford intended reaction products with good yield without need for any special post-reaction treatment.
摘要:
1-Acetylaminotricyclo [4.3.1.1.sup.2,5 ] undecane is prepared by reacting either (a) 1-substituted tricyclo [4.3.1.1.sup.2,5 ] undecane, wherein the substituent is Cl, Br or OH, or (b) endo-2-hydroxymethyl-exo-2,3-trimethylenenorbornane with acetonitrile, in the presence of sulfuric acid. 1-Acetylaminotricyclo [4.3.1.1.sup.2,5 ] undecane is useful as an intermediate to prepare antiviral substances.
摘要:
This invention relates to novel 3-amino-4-homoisotwistane (3-amino-tricyclo [5.3.1.0.sup.3,8 ] undecane), an acid addition salt thereof, and to a process for producing the same.
摘要:
The hydride transfer reduction rearrangement of 8-exo-hydroxymethyl-endo-tricyclo [5.2.1.0.sup.2,6 ] decane in the presence of concentrated sulfuric acid and a hydride source provides 4-homoisotwistane (tricyclo [5.3.1.0.sup.3,8 ] undecane).