Selective Ethylation Of Furoin And Synthetic Study Of Some Fused Ring Compounds With Furan Nucleus

Furfural is a very important the raw chemical material.The raw material which can produce furfural is the waste material of agriculture by-product forestry such as corncob and maize straw. Our country have abundant agriculture resources, which supply furfural product with material bast, consequently, the exporting and output of furfural are seniority among many countries in the world.Seting up from economical results.It is necessary that furfural be deep processed.Furoin differently reaction with bromoethane, iodoethane, diethyl sulfate and ethylene bromide , corresponding to the ethylation products (1,2,3,4,5) of furoin were synthesized respectively. 1,2,3 of them are new furanoids with furfural nucleus.By characterization with elementary analysis, Mass spectrum and 1HNMR, the structural formula of target products were distinctively demonstrated.We have synthesized some new conjugated systems with furfural nucleus. They're 2,3-di(furan-2-yl)quinoxaline, 2,3,5,6-tetra(furan-2-yl) pyrazine, 2,3,4,5-tetra(furan-2-yl)-1H-pyrrole, (E)-1,2,3-tri(furan-2-yl)prop-2-en-1-one and (1Z,3Z)-2,3-diphenyl-1,4 -di(2-furanyl)-1,3-butadiene.We'll do more research in their structures, reactions and functions.