Title: Benzothiophenes

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Abstract: The invention relates to a process for the production of new benzo[b]thiophenes of formula I ##SPC1## wherein PH is optionally substituted o-phenylene, one of the radicals R.sub.1 and R.sub.2 is hydrogen or lower alkyl, and the other of the radicals R.sub.1 and R.sub.2 is optionally C-substituted piperidyl which optionally carries hydroxy on the ring-C-atom bound to the benzo[b]thienyl radical, or which optionally contains a C-C-double bond emanating from this C-atom, and which optionally carries on the N-atom a hydrocarbon radical of aliphatic character, which radical is optionally substituted in a position higher than the 1-position, and of their acid addition salts. These new compounds possess valuable pharmacological properties. In particular they inhibit mono-amine oxidase and further inhibit the absorption of noradrenaline and serotonine in the brain. They are useful as active substances for pharmaceutical preparations for the treatment of mental depressions and psychoses.


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