Antibacterial compounds of formula (I) are provided, as well as stereoisomers and pharmaceutically acceptable salts thereof; pharmaceutical compositions comprising such compounds; methods of treating bacterial infections by the administration of such compounds; and processes for the preparation of such compounds.
Synthesis of the Complete Carbocyclic Skeleton of Vinigrol
作者:Lionel Gentric、Issam Hanna、Louis Ricard
DOI:10.1021/ol034217k
日期:2003.4.1
[reaction: see text] An efficient entry to the fully elaborated skeleton of vinigrol is described. The installation of the desired stereochemistry at C(12) and the construction of the eight-membered ring were achieved in one operation by a remarkably facile anionic oxy-Cope rearrangement of Z-isopropenyl isomer 24.
AlCl
<sub>3</sub>
‐Promoted Facile
<i>E</i>
‐to‐
<i>Z</i>
Isomerization Route to (
<i>Z</i>
)‐2‐Methyl‐1‐buten‐1,4‐ylidene Synthons for Highly Efficient and Selective (
<i>Z</i>
)‐Isoprenoid Synthesis
作者:Guangwei Wang、Ei‐ichi Negishi
DOI:10.1002/ejoc.200801188
日期:2009.4
AlCl3-promoted stereoisomerization at 50 °C for 6 h provides 4-iodo-3-methyl-3-buten-1-ols 2b and 6 of ≥98 Z configuration in 87 and 67% yields, respectively. (Z)-1,4-Diiodo-2-methyl-1-butene (1b) obtainable by iodination of 2b is a valuable synthon for efficient and selective syntheses of (Z)-alkene containing isoprenoids.
Stereoselective synthesis of 1,2,4-triols via intramolecular bis-silylation of CarbonCarbon triple bonds followed by hydrogenation
作者:Masahiro Murakami、Hideaki Oike、Mitsuru Sugawara、Michinori Suginome、Yoshihiko Ito
DOI:10.1016/s0040-4020(01)89908-7
日期:1993.5
new strategy for the stereoselectivesynthesis of 1,2,4-triols has been developed. An alkyne tethered to a disilanyl group, upon treatment with palladium acetate and tert-alkyl isocyanide, furnished an exocyclic bis-silylated olefin. Subsequent hydrogenation took place from the less-hindered side of the ring producing cis-disubstituted oxasilolane. Oxidation of the two CSi bonds of the hydrogenated
Electrocyclic Ring Closure of the Enols of Vinyl Quinones. A <i>2H</i>-Chromene Synthesis
作者:Kathlyn A. Parker、Thomas L. Mindt
DOI:10.1021/ol0167199
日期:2001.11.1
Thermolysis of enolizable vinyl quinones in polar, aprotic media provides 2H-chromenes. Experimental evidence supports a two-step mechanism in which enolization is followed by a thermal 6pi-electrocyclic reaction of an intermediate quinone methide. Application of this method led to the total synthesis of the reputed structure of an Ageratum juvenile hormone. When enolizable vinyl quinones are the products