摘要:
A process of reducing unsaturated organic compounds efficiently by using industrially inexpensive and easily handleable trichlorosilane as the reducing agent to thereby obtain the corresponding reductants; and reducing agents. Specifically, a process for the preparation of reductants of unsaturated organic compounds, characterized by conducting the reduction of an unsaturated organic compound by mixing the compound with trichlorosilane in the presence of a compound capable of reacting with trichlorosilane to give a five-coordinate silicon complex, e.g., N-formylated secondary amine having 3 or more carbon atoms; and reducing agents consisting of specific silicon complexes.
摘要:
An N-alkoxycarbonyl-N-cyanoethyl amino acid alkyl ester is produced at a high yield by reacting a mineral acid salt of amino acid alkyl ester with acrylonitrile in an alcohol medium in the presence of an inorganic base to form an N-cyanoethyl amino acid alkyl ester and then reacting the N-cyanoethyl amino acid alkyl ester with a dialkyl dicarbonate.
摘要:
An industrially advantageous process for producing di-tert-butyl bicarbonate from tert-butyl alcohol and an alkali metal comprises continuously carrying out the following steps:
(A) reacting tert-butyl alcohol with sodium to form sodium tert-butoxide; (B) reacting the sodium tert-butoxide with carbon dioxide to form mono-tert-butyl sodium carbonate; and (C) reacting the mono-tert-butyl sodium carbonate with an aromatic sulfonyl halide such as p-toluenesulfonyl chloride in the presence of a tertiary amine such as N,N,N',N'-tetramethylethylenediamine,
without isolating an intermediate in the middle of each reaction stage.
摘要:
A process of reducing unsaturated organic compounds efficiently by using industrially inexpensive and easily handleable trichlorosilane as the reducing agent to thereby obtain the corresponding reductants; and reducing agents. Specifically, a process for the preparation of reductants of unsaturated organic compounds, characterized by conducting the reduction of an unsaturated organic compound by mixing the compound with trichlorosilane in the presence of a compound capable of reacting with trichlorosilane to give a five-coordinate silicon complex, e.g., N-formylated secondary amine having 3 or more carbon atoms; and reducing agents consisting of specific silicon complexes.
摘要:
The present invention relates to a simple process for producing 2-aminothiazoleacetic acid derivatives useful as intermediates for producing cephalosporin-type antibiotics. The process for producing chloroacetylaminothiazoleacetic acid derivatives represented by the following formula (II) wherein R1 is a protection group for the hydroxyl group, comprises reacting aminothiazoleacetic acid derivatives represented by the following formula (I) wherein R1 is a protection group for the hydroxyl group, with a chloroacetylating agent.