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:
Aug. 12, 1997
Filed:
Mar. 24, 1995
Applicant:
Inventors:
Atsusuke Terada, Hiromachi, JP;
Yoshio Iizuka, Hiromachi, JP;
Kazuyuki Wachi, Hiromachi, JP;
Kenji Fujibayashi, Hiromachi, JP;
Assignee:
Sankyo Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
544 59 ; 544 60 ; 544 61 ; 544 584 ; 544362 ; 544364 ; 544365 ; 544372 ; 544376 ; 544379 ; 5142282 ; 546192 ; 546207 ; 546226 ;
Abstract
A process for preparing a compound of the formula (I): ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulfur, oxygen or imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV):