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US 5,399,714 AGranted
Process for the preparation of substituted indoles
AssigneeCiba-Geigy Corporation
InventorsMarc Gerspacher, Alfred Sallman
Life of this patent
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Abstract
The invention relates to a novel process for the preparation of compounds of formula I ##STR1## wherein R is straight-chain C.sub.2 -C.sub.4 alk-1-en-1-yl, and salts thereof, and to a novel starting material and the use thereof.
Claims8
A process for the preparation of a compound of formula I ##STR14## wherein R is straight-chain C.sub.2 -C.sub.4 alk-1-en-1-yl, or a salt thereof, wherein
- a) a compound of formula IV ##STR15## is reduced in a one-pot process, that is to say, without isolation of intermediates, and is simultaneously N-acylated with the compound of formula V ##STR16## and b) a compound of formula VIa so obtainable ##STR17## is reacted with a compound of formula VIb ##STR18## or with a salt thereof,
Dependencies are inferred from the claim text.