Indole derivatives,process for producing them and their use as intermediates
Реферат: Indole derivatives of formula I <IMAGE> (I) R is hydrogen, one or two halogen atoms or one or two organic radicals in the 4-, 5-, 6- or 7-position(s), R1 and R4 are the same or different and each is hydrogen, alkyl of 1 to 3 carbon atoms or alkoxyalkyl of 1 to 3 carbon atoms in each of the alkoxy and alkyl portions, R3 is phenyl, -COOalkyl, -PO3(alkyl)2, -SO2aryl, -SO2alkyl, <IMAGE> +TR <IMAGE> each of 1 to 3 carbon atoms in each alkyl group, and A and B each independently is alkyl of 1 to 3 carbon atoms or together with the connecting N-atom form a pyrrolidono, piperidino, morpholino or piperazino group, are valuable intermediates for preparing valuable tryptophans and beta -carbolines.
Guanidinealkyl-1,1-bisphosphonic acid derivatives process for their preparation and their use
Номер патента: US5498617A. Автор: Hans-Jochen Lang,Christoph Naumann,Jurgen Sandow,Anne-Marie Moura. Владелец: Hoechst AG. Дата публикации: 1996-03-12.