Method of preparing 16-dehydro vitamin D compounds
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United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Apr 29, 1998
filing date -
May 2, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a new method of preparing 16-dehydro vitamin D compounds having formula I ##STR1## wherein: R has the epi-configuration or the normal configuration and represents straight or branched C.sub.1-6 -alkyl, C.sub.2-6 -alkenyl, C.sub.3-6 -cycloalkyl, or an aromatic group optionally substituted with halogen, C.sub.1-3 -alkyl or alkoxy, Z is a saturated or unsaturated straight hydrocarbon group or oxahydrocarbon group containing 3-6 C-atoms which may be substituted with OH, F, alkyl (C.sub.1-3) or cycloalkyl (C.sub.3-5), R.sub.1 is hydrogen or an hydroxy protecting group, R.sub.2 is hydrogen or hydroxy, and A and B represent hydrogen or methyl, or together form the methylene group, to the new compounds having this formula and to new intermediates obtainable according to this process.
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