Synthetic Communications p. 4407 - 4413 (2007)
Update date:2022-08-28
Topics:
Hiroki, Kazuaki
Morii, Nahoko
Yamashita, Hiroshi
Sugiyama, Jun-Ichi
9-Fluorenone (1) smoothly reacts with phenoxyethanol (2) in the presence of Al3+-montmorillonite catalyst and 3-mercaptopropionic acid as a cocatalyst under microwave irradiation at 160°C for 10 min to give 9,9-bis[4-(2- hydroxyethoxy)phenyl]fluorene (3) in 81% yield, which was much higher than the yield of 33% obtained by conventional heating using an oil bath. A similar acceleration effect of microwave irradiation was observed in other metal-cation-exchanged montmorillonite catalysts as well. Copyright Taylor & Francis Group, LLC.
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