Intermediates for the Synthesis of Vitamin D

The invention relates to an improved process for preparing Ä(3aR,4S,7aS)-4-bromooctahydro-7a-methyl-1H-indene-1,5-dioneÜ. (S)-(+)-2,3,7,7a-tetrahydro-7a-methyl-1H-indene-1,5(6H)-dione is reduced by reaction with diisobutylaluminum hydride and hexamethylphosphoric triaminde in the presence of a catal...

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Bibliographische Detailangaben

1. Verfasser:	DANIEWSKI, ANDRZEJ ROBERT
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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