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US 2010/0145105 A1Published application
Novel phenylboronic acid compounds and intermediates and processes for the preparation thereof
AssigneeGalderma Research & Development
InventorsEric Terranova, Jean-Claude Pascal
Life of this patent
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Abstract
Vitamin D derivatives, notably non-steroidal vitamin D derivatives, are prepared from novel disubstituted phenylboronic acid compounds having the formula (I): and also from the novel intermediates having the formulae (1), (2), (3) and (10):
Claims3
A non-steroidal vitamin D analogue prepared from a disubstituted phenylboronic acid compound of the following structural formula (I):
- in which:
- R1 is a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms,
- R2 and R3, which may be identical or different, are each an alkyl radical having from 1 to 4 carbon atoms, and
- R4 is the —B(OH)2 radical or the radical of formula:
1 more element
Dependencies are inferred from the claim text.