Patent ID: 7902381

Claim:
A method for preparing formula (1) benzoxathiepine derivatives in which: R 1 and R 2 , identical or different, represent: a hydrogen atom; a fluorine atom or a chlorine atom; a hydroxy group; an alkyl radical, chosen from among the radicals methyl, ethyl, propyl, or isopropyl; an alkoxy radical, chosen from among the radicals methoxy, ethyloxy, propyloxy, or isopropyloxy; when groups R 1 and R 2 occupy adjacent positions on the aromatic ring, then R 1 R 2 represents —CH 2 CH 2 CH 2 —, —OCH 2 CH 2 —, —OCH 2 O—, or —CH 2 CH 2 O—; R 3 represents: an alkyl radical, chosen from among the radicals methyl, ethyl, propyl, or isopropyl; a hydroxy group or a methoxy radical; R 4 represents: a hydrogen atom or a methyl radical; R 5 and R 6 , identical or different, represent: a hydrogen atom; an alkyl radical, chosen from among the radicals methyl, ethyl, or isopropyl; an alkoxy radical, chosen from among the radicals methoxy, ethyloxy, or isopropyloxy; an alkylthio radical, chosen from among radicals methylthio, ethylthio, or isopropylthio; an alkylamino radical, chosen from among the radicals N-methylamino or N,N-dimethylamino; or R 4 R 5 represents a radical chosen from among the radicals —CH 2 CH 2 —, —CH 2 O—, —CH 2 CH 2 O—, —CH 2 CH 2 S—, —CH 2 CH 2 NR 4 — and R 6 is as defined previously, characterized such that it is prepared by the reduction of an amide of formula (9) optionally obtained by condensation of the intermediates of formulae (5) and (7), or of the intermediates of formulae (5) and (8) in which radicals R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 have the meaning given above with regard to formula (1).