Entirely solvent-free procedure for the synthesis of distillable 1, 3-dithianes using lithium tetrafluoroborate as a reusable catalyst
K Kazahaya, S Tsuji, T Sato
Index: Kazahaya, Kiyoshi; Tsuji, Shinya; Sato, Tsuneo Synlett, 2004 , # 9 p. 1640 - 1642
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Citation Number: 11
Abstract
Abstract Treatment of various types of aldehydes and ketones with 1, 3-propanedithiol in the presence of a catalytic amount of lithium tetrafluoroborate at 25 C under solvent-free conditions followed by direct purification by distillation of the resulting mixture affords the corresponding 1, 3-dithianes in good to excellent yields. Chemoselective protection of keto aldehydes is also successfully achieved over the catalyst. The catalyst can be recovered ...
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