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To a stirred solution of 30 g (0.134 mole) of 6-methoxy-3-phenylbenzofuran in 150 ml of acetic acid is added 30 ml of 47% stabilized hydroiodic acid. The mixture is heated to its reflux temperature and maintained at reflux for seven hours. A precipitate is obtained which is separated by filtration, rinsed with water and dried to provide crude 6-hydroxy-3 -phenylbenzofuran, m.p. 138°-143° as an off-white powder.

1. temperatureThe mixture is heated to its
2. temperaturereflux temperature
3. temperaturemaintained
4. temperatureat reflux for seven hours
5. customA precipitate is obtained which
6. customis separated by filtration
7. washrinsed with water
8. customdried