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
2H,8H-benzo[1,2-b:3,4-b']dipyran-2,8-diones, 2H,8H-benzo[1,2-b:5,4-b'] 的新合成二吡喃-2,8-二酮、2H-呋喃[2,3-h][1]苯并吡喃-2-酮和7H-呋喃[3,2-g][1]苯并吡喃-7-酮是通过开发获得的2-吡喃酮和呋喃环在香豆素上。6- 或 8-Ally-7- 羟基香豆素与 2,3-二氯-5,6-二氰基苯醌 (DDQ) 氧化得到苯并二吡喃酮和呋喃苯并吡喃酮。现在合成的化合物的结构是通过分析、光谱和与由已知程序制备的真实样品进行比较来确定的。