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. 21, 1992
Filed:
May. 18, 1990
Applicant:
Inventors:
Yusuke Amino, Kawasaki, JP;
Hisao Iwagami, Kawasaki, JP;
Assignee:
Ajinomoto Co., Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07H / ; C07H / ;
U.S. Cl.
CPC ...
536 23 ; 536 24 ; 536 26 ;
Abstract
A process for preparing 2',3'-didehydro-2',3'-dideoxynucleoside derivatives (III) ##STR1## by reacting a compound (I) ##STR2## with a viologen (N,N'-dialkyl-4,4'-bipyridinium salt) is disclosed. In the formulae R.sup.1 is C.sub.1-12 acyl or sulfonyl, R.sup.2 is hydrogen, C.sub.1-12 acyl, C.sub.1-12 alkyl, C.sub.6-18 aralkyl, or silyl, X is a halogen atom, and B is a purine, pyrimidine, imidazole, or triazole base residue.