Verfahren zur Herstellung von Benzodiazepinen und ihren Salzen

摘要

1,260,479. Indoles; benzodiazepines. SUMITOMO CHEMICAL CO. Ltd. 5 Dec., 1968 [8 Dec., 1967 (2); 9 Dec., 1967; 21 Dec., 1967], No. 57773/68. Heading C2C. Indole and benzodiazepine derivatives are prepared by the following route: (R1,2=H, halogen, NO 2 , C 1-4 alkyl or alkoxy, haloalkyl; R3 = H, C 1-4 alkyl; R4 = C 1-4 alkyl; or -NR3R4 = 5- or 6-membered ring which may be substituted and may contain a further heteroatom; A = C 1-5 alkylene), optionally followed by salt formation at any stage. Reference has been directed by the Comptroller to Specifications 1,040,548; 1,077,358; and 1,098,242.