A novel synthesis of diareno-1,2-diazepines: intramolecular dehydrofluorination of 2,4,6-trimethylphenylazo-derivatives of fluoroaromatic compounds
作者:Adam C. Alty、Ronald E. Banks、Brian R. Fishwick、Robin G. Pritchard、A. Ronald Thompson
DOI:10.1039/c39840000832
日期:——
Formation of 1,2-diazepines via intramolecular elimination of hydrogen fluoride derived from methyl and fluorine substituents lying ortho to NN linkages occurs when the azo-compounds 2,4,6-Me3C6H2NNC6F5, 2,4,6-Me3C6H2NNC6F4CF3-4, and 4-(2,4,6-Me3C6H2NN)C5F4N are heated in organic solvents; for example, 2,3,5,6-tetrafluoro-4-(2,4,6-trimethylphenylazo)pyridine cyclizes to give 1,3,4-trifluoro-7,9-dimethyl-11H-pyrido[4
的1,2-二氮杂形成通过氟化氢分子内消除选自甲基和氟的取代基衍生躺在邻到N时的偶氮化合物2,4,6-我发生n键的3 c ^ 6 ħ 2 Ñ NC 6 ˚F 5,2 ,4,6-Me 3 C 6 H 2 N NC 6 F 4 CF 3 -4和4-(2,4,6-Me 3 C 6 H 2 N N)C 5 F 4N在有机溶剂中加热;例如,2,3,5,6-四氟-4-(2,4,6-三甲基苯基偶氮)吡啶环化得到1,3,4-三氟-7,9-二甲基-11 H-吡啶[4,3 - c ^ ]苯并[1,2]二氮杂,其中已通过确定的分子参数X射线晶体学。