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:
Mar. 29, 1977
Filed:
Dec. 13, 1974
Applicant:
Inventors:
Yasuhiko Aoki, Toyonaka, JA;
Hiroyuki Suzuki, Takarazuka, JA;
Hisao Akiyama, Nishinomiya, JA;
Shigeru Okano, Kawanishi, JA;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603097 ;
Abstract
A new method for the production of intermediates in the synthesis of an optically active biotin, which comprises reacting a dicarboxylic acid of the formula: ##SPC1## Or its reactive derivative with an optically active primary amine, reducing the resulting trione with a metal hydride, hydrolyzing the resultant amide-alcohol and treating the thus produced lactone with a thiolactonating agent to give a thiolactone of the formula: ##SPC2## , the said trione and amide-alcohol being respectively novel and representable by the formulae: ##SPC3##