Process for the preparation of benzothiazepinone derivatives

Details Process for the preparation of benzothiazepinone derivatives Process for the preparation of benzothiazepinone derivatives

1989-01-04

1990-08-14

Bond, Robert T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

C07D281210

Patent

active

049488864

ABSTRACT:
Benzothiazepinone derivatives can be prepared by alkaline hydrolysis of benzothiazoles to give o-amino-thiophenols, isolation thereof by acidification and further reaction with acrylic acids. In this connection, the acidification is carried out using a mineral acid, after which the o-amino-thiophenol is extracted using a water-insoluble solvent and is reacted in this extract with an acrylic acid.

REFERENCES:
patent: 2791612 (1957-05-01), Kinstler et al.
patent: 3075967 (1963-01-01), Krapcho
Bulletin Des Societes Chimiques Belges, Band 60, 1951, Seiten 319-324, Osford, GB; J. Nys et al.: "Synthese et Caracterisation de l'o-amino-thiophenol" *Insgesamt, Insbesondere Seite 322, Beispiel 1*.

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