8-oxabicyclo[3.2.1]oct-6-en-3-one as a module for the synthesis of β-alkoxy-δ-valerolactones relevant to natural products and drugs
摘要:
The enantioselective synthesis of all four stereoisomeric cis-3.5 and trans-3.5-substituted beta-alkoxy-delta-valerolactones was accomplished starting from 8-oxabicyclo[3.2.1]oct-6-en-3-one. (C) 1997 Elsevier Science Ltd.
[EN] HEPATITIS C VIRUS INHIBITORS<br/>[FR] INHIBITEURS DU VIRUS DE L'HÉPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2012021591A1
公开(公告)日:2012-02-16
The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.
Asymmetric synthesis of the lactone moiety of mevinic acid
作者:Mark Lautens、Shihong Ma、Adrian Yee
DOI:10.1016/0040-4039(95)00792-b
日期:1995.6
Nickel catalyzed reductive ring-opening of oxabicyclic[3.2.1] compound 3 and enzymatic acetylation of cycloheptenol 4 were used as key steps to prepare the (+)-enantiomer of a derivative of mevinicacidlactone.
Synthesis of Cyclohexenols and Cycloheptenols via the Regioselective Reductive Ring Opening of Oxabicyclic Compounds
作者:Mark Lautens、Shihong Ma、Pauline Chiu
DOI:10.1021/ja964361j
日期:1997.7.1
The reductive ring opening of oxabicycliccompounds has been achieved. While RMgBr/MgBr2 works in a few limited substrates, diisobutylaluminum hydride reacts with oxabicyclic[3.2.1]- and -[2.2.1]alkenes to provide cycloheptenols and cyclohexenols in good yield and in some cases in good regioselectivity. With some substrates further reduction of the alkene was observed which led us to examine transition
Efficient Enantioselective Synthesis of Functionalized Tetrahydropyrans by Ru-Catalyzed Asymmetric Ring-Opening Metathesis/Cross-Metathesis (AROM/CM)
作者:Dennis G. Gillingham、Osamu Kataoka、Steven B. Garber、Amir H. Hoveyda
DOI:10.1021/ja0458672
日期:2004.10.1
efficient method for enantioselectivesynthesis of highly functionalized pyrans (up to 98% ee) through Ru-catalyzed asymmetricring-opening metathesis/cross-metathesis is described. Reactions are promoted by a recyclable chiral Ru-chloride or a new chiral Ru-iodide complex; the latter catalyst is less efficient but gives rise to significantly higher levels of enantioselectivity. Catalytic reactions can be
Asymmetric synthesis of polyacetate derived building blocks with α-oxyanion functionality. Lewis acid catalyzed opening of 2,9-dioxabicyclo[3.3.1]nonan-3-ones
作者:Ralf Dunkel、H.M.R Hoffmann
DOI:10.1016/s0040-4020(99)00460-3
日期:1999.7
(Scheme 1) are obtainable from8-oxabicyclo[3.2.1]oct-6-en-3-one which functions as a meso-configurated 4-way optical switch. Lewis acid assisted nucleophilic ring opening of anomeric [3.3.1] oxabicyclic lactones is a key step. The utility of the methodology is exemplified by a 6 step synthesis of the C17–C23 fragment of spongistatin (altohyrtin) and C-glycoside analogues.