The use of t-butyl acetothioacetate as a route to bis-β-ketomacrolides
作者:Christina M. J. Fox、Steven V. Ley、Alexandra M. Z. Slawin、David J. Williams
DOI:10.1039/c39850001805
日期:——
Dianions from t-butylacetothioacetate may be alkylated at the γ-carbon atom with suitably protected iodoalkanols to afford useful precursors for dimerisation to novel bis-β-ketomacrolides in the presence of copper(I) trifluoroacetate.
Cyclic oligolides via acylketene mediated lactonization: Synthesis and characterization
作者:Shawn W.E. Eisenberg、Chixu Chen、Jiangyue Wu、Carlito Lebrilla、Mark J. Kurth
DOI:10.1016/0040-4039(96)01757-1
日期:1996.10
An acylketenemediated cyclization protocol delivers a series of cyclicoligolides, the largest characterized cyclicoligolide having a 77-membered ring. 6-(ω-Hydroxyalkyl)dioxinone analogs were prepared and cyclizations were conducted under a variety of conditions in refluxing toluene. 1H-NMR, 13C-NMR, and several different mass spectrometric techniques were employed to verify the cyclic nature of
Thermal cycloreversion of 2,2-dimethyl-6 (.omega.-hydroxyalkyl)-4H-1,3-dioxin-4-ones: mono-, di-, and trimeric macrocyclic .beta.-keto lactones by intramolecular trapping of (.omega.-hydroxy)acylketenes
作者:Chixu Chen、Erik K. Quinn、Marilyn M. Olmstead、Mark J. Kurth
DOI:10.1021/jo00070a047
日期:1993.8
Preparation of β-ketomacrolactones and β-ketodiolides using S-t-butyl 3-oxobutanethioate and S-t-butyl 4-diethylphosphono-3-oxobutanethioate
作者:Paul M. Booth、Howard B. Broughton、Mark J. Ford、Christina M.J. Fox、Steven V. Ley、Alexandra M.Z. Slawin、David J. Williams、Peter R. Woodward