Para-selectivity enhancement by coexistent molecules in phenol hydroxylation over TS-1/H2O2 system

Toshiyuki Yokoi; Peng Wu; Takashi Tatsumi

doi:10.1016/S1566-7367(02)00228-5

Para-selectivity enhancement by coexistent molecules in phenol hydroxylation over TS-1/H₂O₂ system

Toshiyuki Yokoi
, Peng Wu
, Takashi Tatsumi^*

^*Corresponding author for this work

Yokohama National University

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

The competitive hydroxylation of phenol with benzene or cyclohexane was conducted over the TS-1/H₂O₂ system. The products were hydroquinone (HQ), p-bezoquinone (p-BQ) and catechol (CA). The p-selectivity in phenol hydroxylation defined as (HQ+p-BQ)/(HQ+p-BQ+CA) was obviously enhanced by the coexistent molecules, and cyclohexane produced a more remarkable enhancing effect than benzene. The coexistent molecules were assumed to impose the steric restriction for the transition state of phenol hydroxylation, resulting in the enhancement of the shape-selectivity.

Original language	English
Pages (from-to)	11-15
Number of pages	5
Journal	Catalysis Communications
Volume	4
Issue number	1
DOIs	https://doi.org/10.1016/S1566-7367(02)00228-5
State	Published - Jan 2003
Externally published	Yes

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title = "Para-selectivity enhancement by coexistent molecules in phenol hydroxylation over TS-1/H2O2 system",

abstract = "The competitive hydroxylation of phenol with benzene or cyclohexane was conducted over the TS-1/H2O2 system. The products were hydroquinone (HQ), p-bezoquinone (p-BQ) and catechol (CA). The p-selectivity in phenol hydroxylation defined as (HQ+p-BQ)/(HQ+p-BQ+CA) was obviously enhanced by the coexistent molecules, and cyclohexane produced a more remarkable enhancing effect than benzene. The coexistent molecules were assumed to impose the steric restriction for the transition state of phenol hydroxylation, resulting in the enhancement of the shape-selectivity.",

author = "Toshiyuki Yokoi and Peng Wu and Takashi Tatsumi",

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AU - Yokoi, Toshiyuki

AU - Wu, Peng

AU - Tatsumi, Takashi

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Y1 - 2003/1

N2 - The competitive hydroxylation of phenol with benzene or cyclohexane was conducted over the TS-1/H2O2 system. The products were hydroquinone (HQ), p-bezoquinone (p-BQ) and catechol (CA). The p-selectivity in phenol hydroxylation defined as (HQ+p-BQ)/(HQ+p-BQ+CA) was obviously enhanced by the coexistent molecules, and cyclohexane produced a more remarkable enhancing effect than benzene. The coexistent molecules were assumed to impose the steric restriction for the transition state of phenol hydroxylation, resulting in the enhancement of the shape-selectivity.

AB - The competitive hydroxylation of phenol with benzene or cyclohexane was conducted over the TS-1/H2O2 system. The products were hydroquinone (HQ), p-bezoquinone (p-BQ) and catechol (CA). The p-selectivity in phenol hydroxylation defined as (HQ+p-BQ)/(HQ+p-BQ+CA) was obviously enhanced by the coexistent molecules, and cyclohexane produced a more remarkable enhancing effect than benzene. The coexistent molecules were assumed to impose the steric restriction for the transition state of phenol hydroxylation, resulting in the enhancement of the shape-selectivity.

UR - https://www.scopus.com/pages/publications/1642288212

U2 - 10.1016/S1566-7367(02)00228-5

DO - 10.1016/S1566-7367(02)00228-5

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JO - Catalysis Communications

JF - Catalysis Communications

IS - 1

ER -

Para-selectivity enhancement by coexistent molecules in phenol hydroxylation over TS-1/H₂O₂ system

Abstract

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