Method of preparation of imidazo (benzothiazoles 2,1 - b) and their salts, the new products thus obtained, the application as medicinal products, these novel products and the pharmaceutical compositions containing them,

摘要

The invention relates to a new process for preparing the compounds (i): & br / (see appended drawing in bopi) & br / in which r1 represents: & br / (see appended drawing in bopi) & br / in which r4 = h, an alkoxycarbonyl radical (c2 - 5), carboxylic, cyano, amido, mono- or dialcoylamido, halogen, r2 and r3 represent: & br / (see appended drawing in bopi) & br / with m = 1, 2 or 3, x1 and x2, represent h, an alkyl, alkoxy (c1 - 5), aralkoxy, aryloxy, halogen, nitrile or an azido or x1 and x2 together form a methylenedioxy, as well as their salts with acids. / p & & p & the products i are useful as medicaments, because of their inverse agonist properties of benzodiazepines and tranquilizing.