Earth abundant metals are much less expensive,promising,valuable metals and could be served as catalysts for the borrowing hydrogen reaction,dehydrogenation and heterocycles synthesis,instead of noble metals.The unifo...Earth abundant metals are much less expensive,promising,valuable metals and could be served as catalysts for the borrowing hydrogen reaction,dehydrogenation and heterocycles synthesis,instead of noble metals.The uniformly dispersed zinc composites were designed,synthesized and carefully characterized by means of XPS,EDS,TEM and XRD.The resulting zinc composite showed good catalytic activity for the N-alkylation of amines with amines,ketones with alcohols in water under base-free conditions,while unsaturated carbonyl compounds could also be synthesized by tuning the reaction conditions.Importantly,it was the first time to realize the synthesis of 2-aryl-1H-benzo[d]imidazole derivatives by using this zinc composite under green conditions.Meanwhile,this zinc catalyst could be easily recovered and reused for at least five times.展开更多
Novel sulfur-containing compounds （3a-3c, 4a-4c） were obtained in ethanol with 1,3-diphenyl-2- propanone as the starting material. The advantages of this procedure were mild reaction conditions, simple protocol, and...Novel sulfur-containing compounds （3a-3c, 4a-4c） were obtained in ethanol with 1,3-diphenyl-2- propanone as the starting material. The advantages of this procedure were mild reaction conditions, simple protocol, and high yields. The structures of the products were characterized by IR, 1H NMR, MS and elementary analysis. The crystal of the new compound 4a belongs to monoclinic, space group C2 with a=18.727（3）, b=6.5179（9）, c=13.7576（18） A, fl=131.0610（10）°, V=I266.2（3）A3, Z=2, Dc=2.136g/cm3, μ=1.078mm 1, F（000）=843, R=0.0490 and wR=0.1247 for 3211 observed reflection with I 〉 2σ（I）. X-ray analysis reveals that the molecule is not symmetrical, the molecular structure is stabilized by weak π-π stacking interactions, and no classical hydrogen bonds can be observed.展开更多
基金financial support of this work by the National Natural Science Foundation of China(Nos.21776111,21861039)State Key Laboratory of Pulp and Paper Engineering(No.202001)Central Laboratory,School of Chemical and Material Engineering,Jiangnan University。
文摘Earth abundant metals are much less expensive,promising,valuable metals and could be served as catalysts for the borrowing hydrogen reaction,dehydrogenation and heterocycles synthesis,instead of noble metals.The uniformly dispersed zinc composites were designed,synthesized and carefully characterized by means of XPS,EDS,TEM and XRD.The resulting zinc composite showed good catalytic activity for the N-alkylation of amines with amines,ketones with alcohols in water under base-free conditions,while unsaturated carbonyl compounds could also be synthesized by tuning the reaction conditions.Importantly,it was the first time to realize the synthesis of 2-aryl-1H-benzo[d]imidazole derivatives by using this zinc composite under green conditions.Meanwhile,this zinc catalyst could be easily recovered and reused for at least five times.
基金the Natural Science Foundation of Hubei Province(No.2012FFB01103)the Hubei Provincial Department of Education(No.Q20131905)+1 种基金the National Natural Science Foundation of China(No.21262011)the Fund of Ethnic Affairs Commission of China(No.12HBZ010)
文摘Novel sulfur-containing compounds （3a-3c, 4a-4c） were obtained in ethanol with 1,3-diphenyl-2- propanone as the starting material. The advantages of this procedure were mild reaction conditions, simple protocol, and high yields. The structures of the products were characterized by IR, 1H NMR, MS and elementary analysis. The crystal of the new compound 4a belongs to monoclinic, space group C2 with a=18.727（3）, b=6.5179（9）, c=13.7576（18） A, fl=131.0610（10）°, V=I266.2（3）A3, Z=2, Dc=2.136g/cm3, μ=1.078mm 1, F（000）=843, R=0.0490 and wR=0.1247 for 3211 observed reflection with I 〉 2σ（I）. X-ray analysis reveals that the molecule is not symmetrical, the molecular structure is stabilized by weak π-π stacking interactions, and no classical hydrogen bonds can be observed.
