26450-58-8Relevant articles and documents
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Arora,P.C.,Woolford,R.G.
, p. 2681 - 2687 (1971)
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A novel application of terminal alkynes as the homogeneous catalysts for acetalization and esterification
Sekerová, Lada,Vysko?ilová, Eli?ka,?erveny, Libor,Sedlá?ek, Jan
, p. 2877 - 2882 (2019/04/17)
The theoretical study focused on the possible use of low-molecular-weight mono-as well as multifunctional terminal alkynes as catalysts for two reactions, which are known to be typically acid catalyzed - acetalization and esterification, is presented in this study. Multifunctional terminal alkynes [(diethynylbenzenes, triethynylbenzene, and tetrakis(4-ethynylphenyl)methane]were significantly more active than the monofunctional ones (cyclopropylacetylene, phenylacetylene, 3-cyclohexylprop-1-yne, 1-ethynyl-2-fluorobenzene, 1-ethynyl-4-fluorobenzene, 4-ethynyltoluene, 4-tert-butylphenylacetylene, and 2-ethynyl-α,α,α-trifluorotoluene), this fact can be partly explained by the higher amount of ethynyl groups per alkyne molecule. We confirmed that terminal ethynyl groups in low-molecular-weight alkynes can successfully act as acid catalytic centers for acetalization as well as for esterification.
Chemoselective protection of aldehydes in the presence of ketones using rupvp complex as a heterogeneous catalyst
Kshirsagar, Siddheshwar W.,Patil, Nitin R.,Samant, Shriniwas D.
experimental part, p. 407 - 413 (2010/04/04)
Ruthenium(III)-polyvinyl pyridine (RuPVP) complex was prepared by refluxing a methanolic solution of polyvinyl pyridine and trihydrated ruthenium trichloride. RuPVP catalyst was characterized by Fourier transform-infrared and diffential scanning calorimetry-thermogravimetry (TG). The catalyst was used for chemoselective protection of aldehydes in the presence of a ketonic carbonyl group.