An efficient fluorination of β-ketosulfones promoted by a room-temperature ionic liquid at ambient conditions under ultrasound irradiation using Selectfluor™ F-TEDA-BF4
摘要:
The fluorination reaction involving a beta-ketosulfones by Selectfluor (TM) was efficiently promoted by the ionic liquid, [Hbim]BF4 (IL) as a reaction medium with methanol as co-solvent at room temperature under ultrasonic irradiation to afford the corresponding mono and difluoro-beta-ketosulfones in excellent yields. The advantages of this method include among others the use of a recyclable, non-volatile ionic liquid, which promotes this protocol under room temperature without the requirement of any added catalyst under ultrasonic irradiation. (C) 2010 Mohammad Reza Poor Heravi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
α-Fluorination of β-ketosulfones by Selectfluor™ F–TEDA–BF4
作者:Hossein Loghmani-Khouzani、Mohammad R. Poorheravi、Majid M.M. Sadeghi、Lorenzo Caggiano、Richard F.W. Jackson
DOI:10.1016/j.tet.2008.05.034
日期:2008.7
Attempted fluorination of β-ketosulfides using Selectfluor™ resulted only in the isolation of the corresponding diaryl disulfides, presumed to arise by decomposition of an unstable fluorinated intermediate. However, fluorination of β-ketosulfones using Selectfluor™ under anhydrous conditions does allow the isolation of both mono-and difluorinated products in moderate to good yields.
An efficient fluorination of β-ketosulfones promoted by a room-temperature ionic liquid at ambient conditions under ultrasound irradiation using Selectfluor™ F-TEDA-BF4
作者:Mohammad Reza Poor Heravi
DOI:10.1016/j.cclet.2010.06.030
日期:2010.12
The fluorination reaction involving a beta-ketosulfones by Selectfluor (TM) was efficiently promoted by the ionic liquid, [Hbim]BF4 (IL) as a reaction medium with methanol as co-solvent at room temperature under ultrasonic irradiation to afford the corresponding mono and difluoro-beta-ketosulfones in excellent yields. The advantages of this method include among others the use of a recyclable, non-volatile ionic liquid, which promotes this protocol under room temperature without the requirement of any added catalyst under ultrasonic irradiation. (C) 2010 Mohammad Reza Poor Heravi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.