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. 27, 2003
Filed:
Sep. 19, 2001
Applicant:
Inventors:
Minoru Kakuda, Chiba, JP;
Takashi Onozawa, Mie, JP;
Hiroshi Kurata, Ibaraki, JP;
Kikuo Furukawa, Ibaraki, JP;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C 3/522 ;
U.S. Cl.
CPC ...
C07C 3/522 ;
Abstract
Adamantanediols are produced by the hydroxylation of adamantane compounds in a water/organic solvent two-phase system in the presence of a ruthenium compound and a hypochlorite. Throughout the hydroxylation, the hypochlorite concentration in the water phase is regulated within a narrow limited range, for example, by monitoring the pH of the reaction system. With such a control of the hypochlorite concentration, the adamantanediols are produced in a high selectivity and a high yield.