Selenolo [3,4- b ]硒烯(3)已经通过两种不同的路线,以2,3-双氯甲基-5-碳甲氧基硒烯(4)或优选4-甲基硒-3-硒烯醛(10)为起始原料合成。与其噻吩类似物相反,噻吩并[3,4- b ]噻吩3是稳定的。所述的分析1个H,13 C和,特别是77硒NMR得到强有力的证据为硒-5的更积极的性质比的硒-1原子3。
A palladium-catalyzed (Pd(PPh3)4/Ag2O/PivOH) C2-regioselective direct dehydrogenative alkynylation of unsubstituted selenophene was achieved. The selenophenes substituted with R1 groups at 2-position can be C5-alkynylated with a variety of 4-substituted phenylacetylenes (R2 groups). The R1 and R2 can be either electron-withdrawing or electron-donating groups, demonstrating a wide range of substrate