FREMGANGSMAATE FOR FREMSTILLING AV PIPERIDINYLCYKLOPENTHYLHEPTENSYREDERIVATER

A process is described for the preparation of a compound of formula (2) (wherein R is a C1-6 alkyl or a C7-20 aralkyl group) and the salts thereof, which comprises reducing a compound of formula (3) (or a salt thereof), using a reducing system comprising borohydride ions and metal ions selected from...

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Bibliographische Detailangaben
Hauptverfasser:	JUDKINS, BRIAN DAVID, MEERHOLZ, CLIVE ALWIN, BARRETT, ROGER
Format:	Patent
Sprache:	nor
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process is described for the preparation of a compound of formula (2) (wherein R is a C1-6 alkyl or a C7-20 aralkyl group) and the salts thereof, which comprises reducing a compound of formula (3) (or a salt thereof), using a reducing system comprising borohydride ions and metal ions selected from lanthanide ions, alkaline earth metal ions or yttrium ions in solution. The reduction system may be provided by a borohydride (e.g. NaBH₄) and a metal salt (e.g. CeCl₃).The ester (2) may then if desired be hydrolyzed to give the parent acid.The ester of formula (3) in which R is a methyl is a novel compound.