1051–1056], the reaction proceeded in THF without the need for DMF as a co-solvent. This method is more selective and provides greater convenience and safety than fluorination of the same substrate by treatment with t-BuOK and perchloryl fluoride (FClO3) in toluene while offering advantages over a number of previously described methods employing alternative electrophilic fluorinating reagents or other approaches
三乙基fluorophosphonoacetate和三乙基difluorophosphonoacetate直接从
膦酰基乙酸三合成由治疗用NaH和1-
氯甲基-4-
氟-1,4-二氮鎓
双环[2.2.2]辛烷双(四
氟硼酸盐)(的Selectfluor ®)。与最近的一份报告相反[CJ Hamilton,SM Roberts,J。Chem。理学硕士,Perkin Trans。1(1999)1051–1056],反应在THF中进行,而无需
DMF作为助溶剂。与通过t- BuOK和高
氯酰
氟(FClO 3),同时提供了优于使用替代性亲电
氟化试剂的其他前述方法或其他方法的优势。无论是单
氟或二
氟的产物可以通过调节碱和的Selectfluor的摩尔比主要得到®。三乙基2-
氟-2-膦酰基(2-(二乙氧基氧膦基)-2- fluoropropanoate)也更方便使用的NaH /三乙基的Selectfluor 2- p