Conditions

Compound 1b

Compound 1c

Compound 3b

Compound 3d

C

M

C

M

C

M

C

M

Temperature (˚C)

70

120

-

100

200

200

200

200

Time (min)

30

10

30

5

240

20

210

20

Yield (%)

84

89

50

82

50

88

91

97