Denitrogenative hydrofluorination of aromatic aldehyde hydrazones using (difluoroiodo)toluene
作者:Kaivalya G. Kulkarni、Boris Miokovic、Matthew Sauder、Graham K. Murphy
DOI:10.1039/c6ob02074g
日期:——
An operationally simple conversion of aromaticaldehydehydrazones to monofluoromethylated arenes is reported. The hypervalent iodine reagent TolIF2 serves as an oxidant, converting the hydrazone to the corresponding diazo compounds. The by-product of the oxidation process, HF, is consumed in situ by a denitrogenative hydrofluorination reaction of the diazo group.
Denitrogenative Hydrotrifluoromethylation of Benzaldehyde Hydrazones: Synthesis of (2,2,2‐Trifluoroethyl)arenes
作者:Zhensheng Zhao、Kevin C. Y. Ma、Claude Y. Legault、Graham K. Murphy
DOI:10.1002/chem.201902818
日期:——
hydrazones of arylaldehydes with Togni's CF3 -benziodoxolone reagent, in the presence of potassium hydroxide and cesium fluoride, induces a denitrogenative hydrotrifluoromethylation event to produce (2,2,2-trifluoroethyl)arenes. This novel reaction was tolerant to many electronically-diverse functional groups and substitution patterns, as well as naphthyl- and heteroaryl-derived substrates. Advantages of this
Synthesis of Aryldihalomethanes by Denitrogenative Dihalogenation of Benzaldehyde Hydrazones
作者:Zhensheng Zhao、Kaivalya G. Kulkarni、Graham K. Murphy
DOI:10.1002/adsc.201700393
日期:2017.7.3
denitrogenative dihalogenation reaction of phenyldiazomethanes in which the hypervalent iodine reagents PhICl2 and TolIF2 act as surrogates for elemental chlorine and fluorine. Halogen transfer from iodane to aryldiazomethane is described, as is a tandem oxidative dihalogenation reaction between iodane and hydrazone. This is the first use of non‐α‐stabilized diazocompounds in this reaction, which provided an