申请人:Boehringer Mannheim GmbH
公开号:US04232024A1
公开(公告)日:1980-11-04
Anti-allergy novel 1-oxo-1H-pyrimido[6,1-b]benzthiazole derivatives of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is hydrogen, halogen, hydroxy, nitro, trifluoromethyl, or lower alkyl, alkoxy or alkylthio, or R.sub.2 and R.sub.3 together are alkylenedioxy, and X is hydroxy, alkoxy or tetrazolyl-5-amino, or salts thereof, as well as their production by saponification of ##STR2## or tautomers thereof, followed by acidification.
抗过敏剂的新型1-氧代-1H-嘧啶并[6,1-b]苯并噻唑衍生物,其化学式为## STR1 ##,其中R.sub.1,R.sub.2,R.sub.3和R.sub.4各自独立地为氢,卤素,羟基,硝基,三氟甲基或较低的烷基,烷氧基或烷基硫醚,或R.sub.2和R.sub.3一起为烷二氧基,X为羟基,烷氧基或五唑基-5-氨基,或其盐,以及它们通过皂化## STR2 ##或其互变异构体,随后酸化的生产。