Preparation of aliphatic diketones by hydrogenolysis of difurylalkanes and difurylalkenes

Reductive coupling of carbonyl compounds promoted by cobalt or titanium nanoparticles

“…Isolated yields for compounds 4 are given in Table 2. The following known compounds included in Table 2 were characterised by comparison of their chromatographic and spectroscopic data ( 1 H, 13 C NMR, and MS) with those described in the literature: 1,2-diphenyl-1-ethene 4a, 19 1,2-di(4-chlorophenyl)-1-ethene 4b, 21 1,2-bis-[4-(dimethylamino)phenyl]ethene 4k, 22 1,2-di(2-furyl)-1-ethene 4l, 23 2,3-diphenyl-2-butene 4g, 24 2,3-di(2-naphthyl)-2-butene 4m, 21 3,4-dimethyl-1,6-diphenyl-1,3,5-hexatriene 4i, 25 1,2-diphenyl-1-cyclohexene 4h, 26 1,2-divinyl-1-cyclohexene 4n, 27 5,6-dibutyl-5-decene 4o.…”