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:
Jun. 02, 1992
Filed:
Feb. 26, 1991
George T Lee, Bloomfield, NJ (US);
Oljan Repic, Randolph, NJ (US);
Sandoz Ltd., Basel, CH;
Abstract
Process for the synthesis of compounds of the formula ##STR1## comprising the steps of (i) reacting a compound of the formula ##STR2## with oxalyl chloride or oxalyl bromide to form the corresponding compound of the formula ##STR3## (ii) reacting said compound of the formula ##STR4## with a compound of the formula ##STR5## to form the corresponding compound of the formula ##STR6## (iii) hydrolyzing said compound of the formula ##STR7## to obtain the corresponding compound of the formula ##STR8## the use of the compounds of the formula ##STR9## for the synthesis of the compounds of the formula ##STR10## and the use of the intermediates of Formula VII for the direct synthesis of the compounds of Formula II, wherein