Process for the production of s(-)-3-/3-acetyl-4-...

Details Process for the production of s(-)-3-/3-acetyl-4-... Process for the production of s(-)-3-/3-acetyl-4-...

C - Chemistry, Metallurgy

07

D

260/557.5, 260/5

C07D 303/22 (2006.01) C07C 275/34 (2006.01)

Patent

CA 1236116

ABSTRACT OF THE DISCLOSURE S(-)-3-[3-acetyl-4-(3-tert.butylamino-2-hydroxypropoxy)-phenyl]- 1,1-diethylureaand its pharmaceutically tolerated acid addition salts, which possess not only astronger .beta.1-receptor blocking action than the racemate but also a pronounced bronchodilating activity. These compounds can be prepared either by racemat resolution by using an enantiomer of di-0,0'-p-toluoyl-tartaric acid or of di- 0,0'-benzoyl-tartaric acid as cleavage acid and fractionated crystallization of the diastereomer salts obtained but also by reacting S(+)-3-[3-acetyl-4-(2,3- epoxy-propoxy)-phenyl]-1,1-diethyl-urea with tert.butylamine. O.Z.759

474847

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