Cyclodextrin based palladium catalysts for Suzuki reaction: An overview

2020 ◽  
Vol 489 ◽  
pp. 107954 ◽  
Author(s):  
U.S. Kanchana ◽  
Elizabeth J. Diana ◽  
Thomas V. Mathew ◽  
Gopinathan Anilkumar
Author(s):  
Елена Сергеевна Бахвалова ◽  
Алексей Владимирович Быков ◽  
Александр Иванович Сидоров ◽  
Линда Жановна Никошвили ◽  
Lioubov Kiwi-Minsker

Данная работа посвящена исследованию влияния типа полимерной матрицы сверхсшитого полистирола на активность и стабильность палладиевых катализаторов кросс-сочетания Сузуки. Показано, что применение сверхсшитого полистирола, функционализированного третичными аминогруппами, может быть перспективным с точки зрения обеспечения стабильности катализатора при рециклах, однако для достижения 100 % конверсии арилгалогенида (4 - броманизола) требуется применение сильного избытка фенилбороновой кислоты и основания. Катализатор на основе нефункционализированного сверхсшитого полистирола обладает более высокой активностью и позволяет, используя полуторакратный избыток фенилбороновой кислоты, достичь полной конверсии 4 - броманизола за 60 мин реакции в мягких условиях (70 °С, растворитель - смесь этанола и воды в соотношении 5:1). Недостатком такой системы является сильная адсорбция продукта кросс-сочетания в гидрофобной полимерной матрице. This work is devoted to the study of the influence of the type of polymeric matrix of hyper-crosslinked polystyrene on activity and stability of palladium catalysts of Suzuki cross-coupling. The use of the hyper-crosslinked polystyrene functionalized with tertiary amino groups was shown to be promising in terms of ensuring of the catalyst stability during recycles, but in order to achieve 100 % conversion of aryl halide (4 - bromanisole) the use of strong excess of phenylboronic acid and of a base is required. The catalyst based on non-functionalized hyper-crosslinked polystyrene had higher activity and allowed achieving complete conversion of 4 - bromanisole during the reaction under mild conditions (70 °C, ethanol and water mixture is in the ratio of 5 : 1 as a solvent) while using 1,5 - fold excess of phenylboronic acid. However, strong adsorption of the cross-coupling product in a hydrophobic polymeric matrix was found to be a disadvantage of such a system.


2011 ◽  
Vol 353 (11-12) ◽  
pp. 2119-2130 ◽  
Author(s):  
Michelangelo Gruttadauria ◽  
Leonarda Francesca Liotta ◽  
Anna Maria Pia Salvo ◽  
Francesco Giacalone ◽  
Valeria La Parola ◽  
...  

2003 ◽  
Vol 22 (7) ◽  
pp. 1364-1371 ◽  
Author(s):  
Robin B. Bedford ◽  
Samantha L. Hazelwood ◽  
Michael E. Limmert ◽  
John M. Brown ◽  
Shailesh Ramdeehul ◽  
...  

2018 ◽  
Vol 42 (8) ◽  
pp. 6416-6426 ◽  
Author(s):  
Trisha Das ◽  
Hiroshi Uyama ◽  
Mahasweta Nandi

The pore size of the mesoporous silica support affects the reactivity of heterogeneous palladium catalysts in the Suzuki reaction under ambient conditions, which is leveled at higher temperature.


2011 ◽  
Vol 31 (12) ◽  
pp. 1478-1482
Author(s):  
Zonghai PENG ◽  
Haiyan FU ◽  
Menglin MA ◽  
Hua CHEN ◽  
Xianjun LI

2010 ◽  
Vol 31 (10) ◽  
pp. 1277-1280
Author(s):  
Chun LIU ◽  
Qijian NI ◽  
Pingping HU ◽  
Hao YUAN ◽  
Zilin JIN

1987 ◽  
Vol 52 (8) ◽  
pp. 2019-2027 ◽  
Author(s):  
Libor Červený ◽  
Nguyen Thi Du ◽  
Ivo Paseka

Palladium catalysts have been used to study the hydrogenation of 1-phenyl-2-butene-1-ol which is accompanied by several side reactions considered to be acid-catalysed. Another model reaction studied was dehydration and subsequent hydrogenation or hydrogenolysis of 1-phenyl-1,3-propanediol to 3-phenyl-1-propanol, accompanied by formation of propylbenzene. The dehydration and propylbenzene formation can be again classified as acid-catalysed reactions. Another one is methanolysis of styrene oxide taking place under conditions of liquid phase hydrogenation due to the acid properties of Pd-H systems. Hydrogenation activity of Pd catalysts was tested by hydrogenation of cyclohexene. Sixteen Pd catalysts on different supports and with different content of active component were used, their activity and selectivity was determined and the effect of variable parameters in the synthesis of these catalysts on the activity and selectivity is discussed.


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