- Magnetically recoverable nanostructured Pd complex of dendrimeric type ligand on the MCM-41: Preparation, characterization and catalytic activity in the Heck reaction
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A palladium complex of a dendrimer type ligand of aminoethylacrylamide immobilized onto the mesoporous channels of MCM-41 with magnetic core was prepared and characterized using various techniques such as XRD, TEM, BET, FT-IR, TGA, and VSM. The prepared nanostructured material was found as a magnetically recoverable catalyst for Heck reaction of aryl halides and vinylic C-H. The catalyst is easily recoverable with an external magnet and is reusable with different leaching amounts depending to loading of Pd. A hot filtration test was also performed and gave evidence that Palladium in heterogeneous samples can dissolve and then redeposit on the surface of the support material.
- Abdollahi-Alibeik, Mohammad,Gharibpour, Najmeh,Ramazani, Zahra
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p. 184 - 199
(2020/11/19)
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- Copper-Catalyzed Cyanation of Aryl- and Alkenylboronic Reagents with Cyanogen Iodide
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Direct catalytic cyanation of organoboronic acids with cyanogen iodide has been achieved by using a copper-bipyridine catalyst system. The cyanation reaction is likely to occur through two catalytic cycles: copper(II)-catalyzed iodination of organoboronic acids and the following cyanidocopper(I)-mediated cyanation of organic iodides.
- Okamoto, Kazuhiro,Sakata, Naoki,Ohe, Kouichi
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supporting information
p. 4670 - 4673
(2015/10/12)
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- An efficient approach to alkenyl nitriles from allyl esters
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A novel and efficient approach to alkenyl nitriles from allyl esters has been developed. A tandem Pd-catalyzed substitution and the subsequent oxidative rearrangement are involved in this transformation. The method provides an important supplement for the synthesis of alkenyl nitriles from allyl esters. Georg Thieme Verlag Stuttgart · New York.
- Zhou, Wang,Xu, Jiaojiao,Zhang, Liangren,Jiao, Ning
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p. 887 - 890
(2011/06/17)
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- An efficient transformation from benzyl or allyl halides to aryl and alkenyl nitriles
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(Figure presented) A novel approach to aryl or alkenyl nitriles from benzyl and allyl halides has been developed. A tandem TBAB-catalyzed substitution and the subsequent novel oxidative rearrangement are involved in this transformation. To the best of our knowledge, this is the first transformation from allyl halides to alkenyl nitriles. The broad reaction scope and the mild conditions may make these methods of use in organic synthesis.
- Zhou, Wang,Xu, Jiaojiao,Zhang, Liangren,Jiao, Ning
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supporting information; experimental part
p. 2888 - 2891
(2010/08/22)
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- Improvement on the synthesis of (E)-alk-3-enoic acids
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(E)-Alk-3-enoic acids have been prepared in high yield (85-90%) and excellent stereoselectivity (98-99%) by a modified Knoevenagel condensation of a straight carbon chain aldehyde with malonic acid, in dimethyl sulfoxide (DMSO) or dimethylformamide (DMF) at 100°C, in the presence of piperidinium acetate as catalyst. Condensation of the aldehyde with a monoester of malonic acid, under the above conditions, gave the corresponding ester of (E)-alk-3-enoic acid in high yield (76-82%) and good stereoselectivity (90-92%). Condensation of the aldehyde with cyanoacetic acid gave the β,γ-unsaturated nitrile in moderate yield (35-40%) without stereoselectivity.
- Ragoussis, Nikitas,Ragoussis, Valentine
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p. 3529 - 3533
(2007/10/03)
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