我们报道了通过Diels-Alder 环加成聚合反应合成二维和三维多孔聚亚苯基 (2D/3D-pPP)。所得的 2D 和 3D-pPP 显示出高达 1553 m 2 g -1的表面积、1.45 cm 3 g -1的孔体积以及在 77 K 下分别为 7.4 和 7.1 wt% 的非常高的 H 2吸收能力,以及具有竞争力的高压CO 2和CH 4吸收性能。
5-(Trimethylstannyl)-2<i>H</i>-pyran-2-one and 3-(Trimethylstannyl)-2<i>H</i>-pyran-2-one: New 2<i>H</i>-Pyran-2-one Synthons
作者:Zhi Liu、Jerrold Meinwald
DOI:10.1021/jo951394t
日期:1996.1.1
5-(Trimethylstannyl)-2H-pyran-2-one (11) and 3-(trimethylstannyl)-2H-pyran-2-one (30), readily prepared from the corresponding bromo-2H-pyran-2-ones, undergo Pd(0)-catalyzed coupling reactions with a variety of enol triflates to give 5- and 3- substituted 2H-pyran-2-ones, respectively, This reaction is applicable to the enol triflates of 14 beta-hydroxy-17-ketosteroids, and therefore may prove useful in convergent syntheses of lucibufagins and bufadienolides.