Apparent Electrophilic Fluorination of 1,3-Dicarbonyl Compounds Using Nucleophilic Fluoride Mediated by PhI(OAc)<sub>2</sub>
作者:Toby J. Nash、Graham Pattison
DOI:10.1002/ejoc.201500370
日期:2015.6
The apparent electrophilicfluorination of 1,3-dicarbonylcompounds using Et3N·3HF as a nucleophilic fluoride source is reported. This reaction requires PhI(OAc)2 as oxidant and can be conducted safely in standard laboratory glassware. Alternative selectivity compared to Selectfluor was observed in some cases. This approach may reduce our reliance on difficult-to-handle fluorine gas and expensive electrophilic
Various α-Oxygen Functionalizations of β-Dicarbonyl Compounds Mediated by the Hypervalent Iodine(III) Reagent<i>p</i>-Iodotoluene Difluoride with Different Oxygen-Containing Nucleophiles
作者:Jun Yu、Jun Tian、Chi Zhang
DOI:10.1002/adsc.200900737
日期:2010.2.15
for the effective introduction of variousoxygen-containing functionalities including tosyloxy, mesyloxy, acetoxy, phosphoryloxy, methoxy, ethoxy and isopropoxy at the α-position of β-dicarbonyl compounds. These transformations can be readily realized by the use of the combined reagent of p-iodotoluene difluoride and variousoxygen-containing nucleophilic compounds such as p-toluenesulfonic acid, methanesulfonic
p -Iodotoluene二氟乙烯(p -Tol-IF 2)已被发现是一种一般用于有效地引入各种含氧官能团包括甲苯磺酰氧基,甲磺酰氧基,乙酰氧基,磷酰甲氧基,乙氧基和异丙氧基在α位的试剂β-二羰基化合物。通过使用对-碘甲苯二氟化物和各种含氧亲核化合物如对甲苯磺酸,甲磺酸,乙酸,磷酸二苯酯,甲醇,乙醇和丙-2-醇的组合试剂,可以轻松实现这些转化。分别在温和的条件下。并且,原位生成的高价碘(III)物种通过在这种转化中,对-碘甲苯二氟化物与相应的含氧亲核试剂之间的配体交换被认为是真正的氧化剂。