反应详情

温度

100 °C

p-Chlorobenzoyl chloride (33.25 g; 0.19 mole) was added with cooling during 20 minutes to a stirred solution of 2-(3-amino-4-hydroxyphenyl)propionitrile (28.35 g; 0.175 mole) in dry pyridine (200 ml.) at 0°-3° C. After addition was complete the mixture was heated at 100° C. for one hour. It was then evaporated under reduced pressure to yield crude 2-(3-p-chlorobenzamido-4-hydroxyphenyl)propionitrile as an oil. The oil was boiled for 30 minutes during which time the temperature of the vapour above the oil rose to 130° C. On cooling the residue solidified. Recrystallisation of the solid from methanol yielded 2-(2'-p-chlorophenyl-5'-benzoxazolyl)propionitrile (29.00 g.) m.p. 150°-153° C.

1. additionAfter addition
2. customIt was then evaporated under reduced pressure