Thieno[2,3-O]azepine compounds and CNS affecting use thereof

A compound of the formula ##STR10## in which:

• R.sup.1 is hydrogen, hydroxy, nitro, cyano, halo, amino, acetamido, hydroxy-C.sub.1-4 alkyl, carboxaldehydo, C.sub.1-4 alkyl-carbonyl, carboxy, C.sub.1-4 alkoxy-carbonyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 alkylsulphonyl or C.sub.1-4 alkoxy-C.sub.1-4 alkyl;
• R.sup.2 is hydrogen, hydroxy, nitro, cyano, halo, amino, carboxamido, acetamido, hydroxy-C.sub.1-4 alkyl, carboxaldehydo, C.sub.1-4 alkylcarbonyl, carboxy, C.sub.1-4 alkoxycarbonyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 alkylsulphonyl, C.sub.1-4 alkoxy-C.sub.1-4 alkyl, oximino or aminomethyl;
• R.sup.3 is naphthyl, benzofuranyl, dihydrobenzofuranyl, benzothienyl, chromanyl, chromenyl, indolyl, indolinyl, indanyl, indenyl, 1,2,3,4-tetrahydronaphthyl, dihydronaphthyl, or quinolinyl, each of which may be substituted with halogen, hydroxy, or C.sub.1-4 alkoxy;
• or R.sup.3 is phenyl optionally substituted with one or more substituents selected from the group consisting of nitro, cyano, amino, hydroxyl, trifluoromethyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, and halo;
• R.sup.4 is hydrogen, C.sub.1-4 alkyl, or C.sub.2-4 alkenyl;
• or R.sup.4 is benzyl optionally substituted on the phenyl nucleus with one or more substituents selected from the group consisting of nitro, cyano, amino, hydroxyl, trifluoromethyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, and halogen;
• or a salt thereof.