Pastushak,N.O. et al., Journal of general chemistry of the USSR, 1964, vol. 34, p. 2254 - 2257
作者:Pastushak,N.O. et al.
DOI:——
日期:——
Graphene based material as a base catalyst for solvent free Aldol condensation and Knoevenagel reaction at room temperature
作者:Sk Manirul Islam、Anupam Singha Roy、Ram Chandra Dey、Sumantra Paul
DOI:10.1016/j.molcata.2014.06.038
日期:2014.11
Graphene oxide (GO) acts as a highly active heterogeneous base catalyst for a wide variety of reactions. Here we have described the catalytic activities of GO in the condensation reaction of various substituted benzaldehydes with acetophenone (aldol condensation) and with active methylene compound malononitrile (Knoevenagel reaction) at room temperature under solvent free condition. GO is characterized by powder X-ray diffraction (XRD), UV-visible spectra, Fourier transform infrared spectroscopy (FT-IR) and AFM. The experimental results showed that the GO had higher catalytic activity and it can be recycled without significant loss of its activity. (C) 2014 Elsevier B.V. All rights reserved.
Blaha, Ivo; Leseticky, Ladislav, Collection of Czechoslovak Chemical Communications, 1986, vol. 51, # 5, p. 1094 - 1099
作者:Blaha, Ivo、Leseticky, Ladislav
DOI:——
日期:——
Stereoselective CrCl2-mediated condensation of aldehydes with functionalized 1,1,1-trichlorides: synthesis of trisubstituted (Z)-chloroolefins
The CrCl2-mediated condensation of aldehydes 1 with a variety of functionalized 1,1,1-trichlorides 2 affords trisubstituted chloroolefins 4 in excellent yields and generally high Z-stereoselectivity. The intermediate dichlorohydrin adducts 3 can be isolated in good yields under conditions of limited reagent and reduced temperature. (C) 2004 Elsevier Ltd. All rights reserved.