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:
May. 30, 1978
Filed:
Sep. 21, 1976
Applicant:
Inventor:
David Thomas Eastlick, Lancaster, EN;
Assignee:
Glaxo Laboratories Limited, Greenford, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
260141 ; 252426 ; 252441 ; 2602 / ; 2602 / ; 2603 / ; 2603477 ;
Abstract
A process for the preparation of diazo compounds, particularly diazo alkanes, is described in which a hydrazone is oxidized to a corresponding diazo compound in a two phase reaction medium in the presence of a phase transfer catalyst, and an oxidation catalyst which is iodine, and iodide or an iodonium salt, preferably in the presence of a base.