Isomerisation of pharmaceutical intermediates
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United States of America Patent
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Issued Date -
Sep 20, 2007
app pub date -
May 11, 2006
filing date -
Mar 17, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to an isomerisation method of vitamin D analogues, such as compounds useful for the synthesis of calcipotriol, and to and to the use of a flow-through photoreactor or continuous flow photoreactor reactor for making said vitamin D analogues. The present invention relates further to the use of intermediates produced with said method for making calcipotriol or calcipotriol monohydrate, or pharmaceutical formulations thereof.
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