The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1982
Filed:
Nov. 21, 1980
Applicant:
Inventors:
Assignee:
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2606 / ;
Abstract
The invention provides a novel and improved method for the preparation of a sodium salt of a 1-alkyne of the general formula ##STR1## in which R.sup.1 and R.sup.2 are each a hydrogen atom or a monovalent hydrocarbon group free from aliphatic unsaturation, by the reaction of a corresponding 1,2-alkadiene with metallic sodium in an inert organic solvent. According to the invention, the metallic sodium is dispersed in the inert solvent as finely as possible to have a particle diameter not exceeding 1000 .mu.m so as that the reaction velocity is very much increased even under atmospheric pressure to give an improved yield of the product.