Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fordonal SA
Original Assignee
Fordonal SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fordonal SAfiledCriticalFordonal SA
Priority to ES544510ApriorityCriticalpatent/ES544510A0/en
Publication of ES8603418A1publicationCriticalpatent/ES8603418A1/en
Publication of ES544510A0publicationCriticalpatent/ES544510A0/en
A 1,4-dihydro pyridine deriv. of formula (I) is made by (a) condensing the aldehyde of formula (II), with methyl aceto-acetate and 3-amino crotono-nitrile of formula (IV) in tetrahydrofurane or dioxane at 15-110 deg. C (b) distilling the prod. under vacuum to obtain a cpd. of formula (V) and (c) reacting thie with methanol in presence of a p-toluene sulphonic acid in alcohol at b.pt.
ES544510A1985-06-251985-06-25
PROCEDURE FOR THE PREPARATION OF A DERIVATIVE OF 1,4-DI-HYDROPYRIDINE
GrantedES544510A0
(en)
6,6-ETHYLENE-15,16-METHYLENE-3-OXO-17-PREGN-4-EN-21,17-CARBOLACTONER, FOERFARANDE FOER DERAS FRAMSTAELLNING OCH DESSA INNEHAOLLANDE PHARMACEUTICAL PREPARATION.