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- W2885226112 abstract "Development of highly active heterogeneous catalysts with strong acidity and mesoporous structure is a highly attractive strategy for organic synthesis. In this study, a mesoporous zeolite beta (HBeta-M) with bulky particle size and strong acidity was synthesized and used in the direct N-alkylation of sulfonamides with alcohols. The strongly acidic HBeta-M had a higher intrinsic activity with initial turnover frequency of 11 × 10–2 s–1 than those of H-form mordenite nanosheets (3.3 × 10–2 s–1) and montmorillonite (4.0 × 10–2 s–1) catalysts. The experiment and characterization results demonstrate that there are two parallel reaction routes on the acidic catalysts. One route is the reaction of benzhydrol with p-toluenesulfonamide (route I). Another route is the reaction of dibenzhydryl ether, arising from route I, with p-toluenesulfonamide (route II), which is found in this work. The reaction rate of route I (13 × 10–3 mol kg–1 s–1) was higher than that of route II (9.8 × 10–3 mol kg–1 s–1) on HBeta-M, but route II predominantly contributed to the formation of the target product with high selectivity. Hereby, a complete reaction mechanism is proposed in this work." @default.
- W2885226112 created "2018-08-22" @default.
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- W2885226112 date "2018-08-17" @default.
- W2885226112 modified "2023-10-13" @default.
- W2885226112 title "Reaction Route and Mechanism of the Direct N-Alkylation of Sulfonamides on Acidic Mesoporous Zeolite β-Catalyst" @default.
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- W2885226112 doi "https://doi.org/10.1021/acscatal.8b02030" @default.
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