Entry

Mole ratio of 1/2

Halogen source

Solvent

Condition

Time

Yielda (%)

1

1:2

NCS

CH3CN

Air

10 h

98

2

1:1.2

NBS

CH3CN

Air

20 min

95

3

1:0.6

TCCA

CH3CN

N2

6 h

87