Abstract: This invention provides new compounds of formula I, ##STR1## wherein R.sub.1 is hydrogen, alkyl of 2 to 8 carbon atoms, or phenylalkyl of 7 to 9 carbon atoms, andR.sub.2 is branched alkyl of 3 or 4 carbon atoms or benzyl,Useful as agents for the treatment of migraine, hypotonia and orthostatic disorders.

Abstract: The invention concerns a novel process for the production of a compound of formula I, ##STR1## wherein R.sub.1 is the cyano group, or -COX, wherein X is the amino group or an -O-(lower)alkyl radical, andR.sub.2 to R.sub.5 are substituents inert to internal cyclization conditions,Comprising subjecting a compound of formula II, ##STR2## wherein the variables R.sub.1 to R.sub.5 are as defined above, and R.sub.6 is a radical capable of leaving under the reaction conditions, to an intramolecular condensation in the presence of a base, the compounds of formula I being useful intermediates in the preparation of ergot alkaloids.

Abstract: This invention provides a new process for the preparation of a compound of formula I, ##STR1## wherein R' is alkyl or cycloalkyl, andR is an organic radical which is inert under the reaction conditions,By oxidizing a compound of formula II, ##STR2## wherein R and R' are as defined above, with nitric acid.

Abstract: Oxygenated decalin derivatives, the use thereof as fragrances or odor-modifying agents, and methods for preparing the said derivatives.