Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Reexamination Certificate
2005-01-18
2005-01-18
Barts, Samuel (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
C556S400000, C568S626000, C568S659000, C568S660000
Reexamination Certificate
active
06844461
ABSTRACT:
The present invention provides a method for the synthesis of an A-ring synthon phosphine oxide used in the preparation of 19-nor vitamin D compounds, and to novel synthetic intermediates formed during the synthesis. The new method prepares the phosphine oxide from (D)-glucose.
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DeLuca Hector F.
Shimizu Masato
Yamada Sachiko
Andrus Sceales Starke & Sawall LLP
Barts Samuel
Wisconsin Alumni Research Foundation
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