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Vitamin D3 derivative and production process thereof

  • US 6,177,586 B1
  • Filed: 06/08/1999
  • Issued: 01/23/2001
  • Est. Priority Date: 06/07/1994
  • Status: Expired due to Term
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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