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US 7,598,408 B2Granted
Intermediates for synthesis of vitamin D derivatives
AssigneeKnc Laboratories Co., Ltd.
InventorsHidekazu Imahori, Hiroya Koyama, Daisuke Yoshihara, Yoshinori Sawashita, Sota Kurita, Yoshihiro Ichihara, Yoshihiro Takagi, Katsutoshi Hirose
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Abstract
The present invention provides a novel intermediate for synthesizing vitamin D derivatives by using a less expensive material. That is, the present invention provides a compound which is synthesized by using carvone as a starting material and which is represented by the following formulae.
Claims6
A compound represented by the following formula (I):
- wherein Y1 and Y2 may be same or different and each is a protective group for hydroxyl group;
- and Y3 is hydrogen atom where a group Y3O— may be either in R configuration or S configuration.
A compound represented by the following formula (I):
- wherein Y1 and Y2 may be same or different and each is a protective group for hydroxyl group;
- and Y3 is a protective group for hydroxyl group where a group Y3O— may be either in R configuration or S configuration.
A compound represented by the following formula (I):
- wherein Y1 is hydrogen atom and Y2 is a protective group for hydroxyl group;
- and Y3 is a protective group for hydroxyl group where a group Y3O— may be either in R configuration or S configuration.
Dependencies are inferred from the claim text.