Styrene epoxidation catalyzed by polyoxometalate/quaternary ammonium phase transfer catalysts: The effect of cation size and catalyst deactivation mechanism

Xiao, Qiongna; Jiang, Yuyan; Yuan, Weiqiang; Chen, Jingjing; Li, Hao‐Hong; Zheng, Huidong

doi:10.1016/j.cjche.2022.04.024

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“…Polyoxometalates (POMs) are significant class of transition metal-oxygen clusters which got attention in catalys chemistry, [1][2][3][4][5][6][7][8] photochemistry, [9][10][11][12] electrochemistry, [13][14][15] medicine chemistry, [16][17][18] materials science. [19] POMs-supported organometallic compounds have attracted attention thanks to the organometallic fragment, which can provide a different reactivity compared to inorganic POMs.…”

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confidence: 99%

Epoxidation of Cis‐cyclooctene with Hydrogen Peroxide Catalyzed by Lindqvist Type Polyoxometalates

Özbek

Demirhan

2023

ChemistrySelect

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In our study, a method for the epoxidation of cis‐cyclooctene was researched using a series of Lindqvist type POMs Cp*2MoxW6−xO17 (x=0, 2, 4, 6) and [Cp*MoxW6−xO18]− (x=0, 1, 5, 6) as a catalyst in the presence of 30 % H2O2 as a green oxidant. This catalytic system containing polyoxometalates and H2O2 has applied the most succesful system in obtaining epoxide product with excellent yields for cis‐cyclooctene in acetonitrile at 55 °C. Maximum epoxidation efficiency of 99 % was observed under optimized conditions for Ph4P[Cp*MoW5O18] (2c).

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