Table 3 Catalytic epoxidation of styrene derivatives in different conditionsa.

From: In situ tuning of electronic structure of catalysts using controllable hydrogen spillover for enhanced selectivity

Catalysts

Condition

Substrates

t (h)

Conversion (%)

Epoxide sel. (%)

CoOx/50Al2O3

TBHP

p-methylstyrene

12

97.1

88.4

  

p-methoxy-styrene

12

80.5

78.2

  

m-nitrostyrene

16

68.4

68.2

  

m-chlorostyrene

12

88.7

69.9

  

2-vinyl naphthalene

12

82.1

79.8

CoOx/50Al2O3/Pt

H2-TBHP

p-methylstyrene

12

86.2

98.2

  

p-methoxy-styrene

12

68.1

94.3

  

m-nitrostyrene

16

59.2

92.3

  

m-chlorostyrene

12

81.1

89.4

  

2-vinyl naphthalene

12

71.5

91.5

  1. aReaction conditions: 3.5 mmol substrates, 7 mmol TBHP (70% in water), 20 ml acetonitrile, and catalysts with the same CoOx content at 80 °C.
Back to article page