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:
Oct. 07, 1980
Filed:
May. 11, 1979
Claude G Demosthene, Aramon, FR;
Christian R Aspisi, Boulbon, FR;
'Societe Anonyme' Expansia, Paris, FR;
Abstract
Preparation process of 2-chloro pyrimidine from 2-amino pyrimidine, hydrochloric acid and an alkali metal nitrite, the reagents being in substantially similar proportions as in the previously known methods, consisting in preparing a mixture of hydrochloric acid and of a non polar solvent of low boiling point, then adding 2-amino pyrimidine wherein there is slowly added, at room temperature, the chloride of a metal selected from the group consisting of the transition metals, tin, antimony, thallium and zinc, then introduced, under an inert gas circulation, the selected nitrite at a temperature not exceeding 10.degree. C. and finally poured the reaction mixture in iced water.