DDQ Oxidation of 6- or 8-Allyl-7-hydroxycoumarins. A New Synthesis of Benzodipyrandiones and Furobenzopyranones
作者:Avula Prashant、Gazula Levi David Krupadanam、Gutety Srimannarayana
DOI:10.1246/bcsj.65.1191
日期:1992.4
A novel synthesis of 2H,8H-benzo[1,2-b:3,4-b′]dipyran-2,8-diones, 2H,8H-benzo[1,2-b:5,4-b′]dipyran-2,8-diones, 2H-furo[2,3-h][1]benzopyran-2-ones, and 7H-furo[3,2-g][1]benzopyran-7-ones was achieved by developing 2-pyrone and furan ring over coumarin. 6- or 8-Ally-7-hydroxycoumarins on oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) afforded benzodipyrandiones and furobenzopyranones. The
Syntheses of Psoralen Analogues and Evaluation of Their Inhibition of Epidermal Growth Factor Binding
作者:Ned D. Heindel、Jacobus M.A.M. Van Dongen、Bruce S. Sachais、John H. Phillips、Michael A. Gallo、Jeffrey D. Laskin
DOI:10.1002/jps.2600800715
日期:1991.7
dihydro analogues for which a combined HPLC-supercritical fluid chromatography method supplies purified materials. These reduced compounds and a related benzodipyranone are biologically active and inhibit the binding of epidermalgrowthfactor on HeLa cells to an even greater extent than trioxsalen. This observation suggests a non-DNA target may play a role in the overall effects of psoralens on cells