Vitamin D3 derivative and production process thereof
First Claim
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1. A cyclopentene derivative represented by the following formula (1-2):
- wherein, R11 is a hydrogen atom, tri(C1 to C7 hydrocarbon)silyl group, C2 to C7 acyl group, group forming an acetal bond together with an oxygen atom of a hydroxyl group, and X1 is a bromine atom or iodine atom.
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Abstract
The starting materials for a production process of a vitamin D3 derivative are disclosed, e.g., a cyclopentene derivative represented by the formula (1-2):
wherein R11 is a hydrogen atom, tri(C1 to C7 hydrocarbon) silyl group, C2 to C7 acyl group, group forming an acetal bond together with an oxygen atom of a hydroxyl group, and X1 is a bromine or iodine atom; and a heptanoic acid derivative represented by the formula (2-4):
wherein X2 is a bromine atom or iodine atom.
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Citations
9 Claims
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1. A cyclopentene derivative represented by the following formula (1-2):
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wherein, R11 is a hydrogen atom, tri(C1 to C7 hydrocarbon)silyl group, C2 to C7 acyl group, group forming an acetal bond together with an oxygen atom of a hydroxyl group, and X1 is a bromine atom or iodine atom. - View Dependent Claims (2, 3)
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4. A cyclopentene derivative represented by the following formula (1-6):
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wherein, R112 is a hydrogen atom, tri(C1 to C7 hydrocarbon)silyl group, C2 to C7 acyl group, or group forming an acetal bond together with an oxygen atom of a hydroxyl group. - View Dependent Claims (5, 6)
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7. A heptanoic acid derivative represented by the following formula (2-4):
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wherein, X2 is a bromine atom or iodine atom.
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8. A heptanoic acid derivative represented by the following formula (3-2):
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wherein, R31 is hydrogen or C1 to C3 alkyl group and R32 is hydrogen or R31 and R32 together are a single substitutable group.
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9. A heptanoic acid derivative represented by the following formula (3-3):
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wherein, R31 and R32 are the same as defined above.
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Specification