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:
Apr. 03, 1990
Filed:
Nov. 26, 1984
Applicant:
Inventors:
Haruo Ogura, Matsudo, JP;
Kimio Furuhata, Tokyo, JP;
Yoshiyasu Shitori, Musashino, JP;
Masayoshi Ito, Kunitachi, JP;
Assignee:
MECT Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B / ;
U.S. Cl.
CPC ...
536 53 ; 536 553 ; 536 187 ;
Abstract
A new process for preparing halides of N-acetylneuraminic acids useful as an intermediate in preparing new N-acetylneuraminic acid derivatives having an excellent immunological activity is provided, which process comprises simultaneously acetylating and halogenating an esterified N-acetylneuraminic acid with the aid of an acetyl halide, and according to the process, the halides may be obtained in high yield of about 90%.