Synthesis of trifluoromethylated analogues of β-l-fucofuranose and β-l-4,6-dideoxyxylohexopyranose
摘要:
Efficient strategy to trifluoromethylated trans-disubstituted alkene 3 was developed starting from commercially available 4,4,4-trifluoro-3-oxobutyric acid ethyl ester 12. 6-Deoxy-6,6,6-trifluorosugars 21 and 30 were synthesized from 3 in high stereoselectivity and in a straightforward fashion. The key steps were Sharpless AD reaction, regioselective ring opening of trifluoromethylated cyclic sulfate, Horner-Wadsworth-Emmons reaction and TEMPO oxidation. It was noteworthy that the oxidation of alcohols 20 and 29 followed by deprotection and acetylation gave the single isomer target molecules 21 and 30, respectively. (C) 2005 Elsevier B.V. All rights reserved.
[EN] HETEROCYCLIC CETP INHIBITORS<br/>[FR] INHIBITEURS DE CETP HETEROCYCLIQUES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2007062308A2
公开(公告)日:2007-05-31
[EN] Compounds of formula (Ia) and (Ib) wherein A, B, C and R1 are described herein. [FR] La présente invention concerne des composés de formules (Ia) et (Ib) dans lesquelles A, B, C et R1 ont les correspondances indiquées dans l'invention.