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.)
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Inke SA
Original Assignee
Inke SA
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Filing date
Publication date
Application filed by Inke SAfiledCriticalInke SA
Priority to ES544503ApriorityCriticalpatent/ES544503A0/en
Publication of ES8604397A1publicationCriticalpatent/ES8604397A1/en
Publication of ES544503A0publicationCriticalpatent/ES544503A0/en
1,8-Diethyl 1,3,4,9-tetrahydropyrane (3,4-b) indole 1-acetic acid of formula (I) is made by (a) reacting 2-ethyl phenylhydrazine hydrochloride (II) with a cpd. of formula (III) in an organic amine, e.g. pyridine, picoline or triethylamine, at 50-120 deg.C, to give a cpd. of formula (IV); (b) hydrolysing this in presence of NaOH, KOH or K2CO3, in water, methanol or ethanol at 50-100 deg.C to obtain (I).
ES544503A1985-06-251985-06-25
PROCEDURE FOR OBTAINING 1,8-DIETHYL-1,3,4,9-TETRAHYDROPYRAN (3,4-B) INDOL-1-ACETIC ACID
GrantedES544503A0
(en)