Claims for Patent: 3,910,924

Summary for Patent: 3,910,924

Title:	3,4-Dihydrocarbostyril derivatives and a process for preparing the same
Abstract:	A novel compound represented by the formula ##SPC1## Wherein R is defined as hereinafter, having a blocking activity on .beta.-adrenergic nerves, a novel intermediate useful for synthesis thereof and processes for preparing the same are disclosed.
Inventor(s):	Tamura; Yasumitsu (Takarazuka, JA), Nakagawa; Kazuyuki (Tokushima, JA), Yoshizaki; Shiro (Komatsujima, JA), Murakami; Nanami (Tokushima, JA)
Assignee:	Otsuka Pharmaceutical (Tokyo, JA)
Application Number:	05/324,905
Patent Claims:	1. A 3,4-Dihydrocarbostyril derivative represented by the formula ##SPC6## and the pharmaceutically acceptable acid addition salts thereof, wherein R represents a straight or branched alkyl group having 1 to 4 carbon atoms. 2. 5-(2-Hydroxy-3-methylamino)propoxy-3,4-dihydrocarbostryil according to claim 1. 3. 5-(2-Hydroxy-3-ethylamino)propoxy-3,4-dihydrocarbostyril according to claim 1. 4. 5-(2-Hydroxy-3-propylamino)propoxy-3,4-dihydrocarbostyril according to claim 1. 5. 5-(2-Hydroxy-3-butylamino)propoxy-3,4-dihydrocarbostyril according to claim 1. 6. 5-(2-Hydroxy-3-tert-butylamino)propoxy-3,4-dihydrocarbostyril according to claim 5.