Abstract: A method for efficiently producing high purity vinyl ether represented by the following formula (1) from tertiary alcohol having a low reactivity comprising by reacting acetylene and a tertiary alcohol in the presence of a base using, as a solvent, a cyclic urea compound or glyme compound or mixture thereof: is provided.

Abstract: A method for efficiently producing high purity vinyl ether represented by the following formula (1) from tertiary alcohol having a low reactivity comprising by reacting acetylene and a tertiary alcohol in the presence of a base using, as a solvent, a cyclic urea compound or glyme compound or mixture thereof: is provided.

Abstract: In view of the fact that a methyl vinyl ether, which is useful as a starting material for the synthesis of tetraalkoxypropane useful as a skeleton-forming agent having a high reactivity usable as a starting material, etc. for a pharmaceutical and agrochemical intermediates such as a pyrazole derivative or pyrimidine derivative, particularly 1,1,3,3-tetramethoxypropane, is in a gaseous state and difficult to use for industrial production, tetraalkoxypropane useful as a skeleton-forming agent for a pharmaceutical and agrochemical intermediate such as a pyrazole derivative or pyrimidine derivative is easily produced on an industrial scale by using the industrially useable propoxyvinyl ether, as a starting material, without using a gaseous state methyl vinyl ether.

Abstract: A method of obtaining a high purity 2-cyanoimino-1,3-thiazolidine, at a high yield, by cyclization reaction of dimethyl N-cyanoiminodithiocarbonate ester with 2-aminoethane thiol or the salt thereof in the presence of an alkali metal hydroxide is disclosed.

Abstract: A method of obtaining a high purity 2-cyanoimino-1,3-thiazolidine, at a high yield, by cyclization reaction of dimethyl N-cyanoiminodithiocarbonate ester with 2-aminoethane thiol or the salt thereof in the presence of an alkali metal hydroxide is disclosed.

Abstract: A method for producing high purity 2-cyanoimino-1,3-thiazolidine comprising the steps of: reacting an alkali metal cyanide compound, an alkali metal hydroxide, a lower alcohol and chlorine in an aqueous solution to form an carboimidic acid ester solution, then adding an organic solvent thereto, followed by adding a cyanamide solution to form an N-cyanocarbonimidic acid ester, and further extracting the resultant ester with an organic solvent extracting solution, followed by washing with an aqueous solution of a reducing agent solution to obtain a high purity, stable N-cyanocarbonimidic acid ester as a first step; and reacting the N-cyanocarbonimidic acid ester obtained in the first step with 2-aminoethanethiol to be cyclicized as a second step to thereby obtain a 2-cyanoimino-1,3-thiazolidine.

Abstract: A method for producing high purity 2-cyanoimino-1,3-thiazolidine comprising the steps of: