Catalysis by Ionic Liquids: Significant Rate Acceleration with the Use of [pmIm]Br in the Three-Component Synthesis of Dithiocarbamates
作者:Brindaban C. Ranu、Amit Saha、Subhash Banerjee
DOI:10.1002/ejoc.200700842
日期:2008.1
An easily accessible neutral ionic liquid, 1-methyl-3-pentylimidazolium bromide, promoted a one-pot three-component condensation of an amine, carbon disulfide, and an activated alkene/dichloromethane/epoxide to produce the corresponding dithiocarbamates in high yields at room temperature. The reactions are very fast in ionic liquids relative to those in other reaction media. These reactions do not
Crystal and molecular structure of methylene bis(piperidine-dithiocarbamate), C13H22N2S4
作者:Suman Sharma、Rakesh Bohra、Ram C. Mehrotra
DOI:10.1007/bf01158976
日期:1991.2
Reaction of anhydrous sodium piperidine dithiocarbamate with methylene chloride yields methylene bis(piperidine dithiocarbamate). The crystals, C13H22N2S4 (M = 334.57), are monoclinic with space group P2l/n, a = 6.421(3), b = 29.321(7), c = 9.022(4) Angstron, beta = 109.05(3)-degrees, V = 1605.6 angstron 3, Z = 4, D(c) = 1.384 g cm-3, F(000) = 712, T = 295-degrees-K lambda(Mo-K-alpha) = 0.71069 angstron, mu = 5.62 cm-1 and R = 0.032 for 1734 reflections. The molecular structure shows that the methylenic group is bonded to two planar[GRAPHICS]moieties at distances of 1.782(3) and 1.803(3) angstron with an S-CH2-S angle of 114.7(2)-degrees. The configuration about each N atom is planar rather than pyramidal. The two C-N bond lengths adjacent to the C = S bonds are both very short 1.330(4) and 1.336(4) angstron indicating the influence of the C = S bond on C-N bond lengths. The six-membered piperidine ring has a classical chair conformation with average C-C distance of 1.511(5) angstron.
Cespedes Carlos, Vega Juan C., Phosph. Sulfur and Silicon and Relat. Elem, 90 (1994) N 1-4, S 155-158
作者:Cespedes Carlos, Vega Juan C.
DOI:——
日期:——
Agra, Fathi M. A. M.; Shah, Shakeel A., Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1995, vol. 25, p. 85 - 92
作者:Agra, Fathi M. A. M.、Shah, Shakeel A.
DOI:——
日期:——
Cespedes, Carlos; Vega, Juan C., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 90, # 1-4, p. 155 - 158