Reaction of Trihalo(phenylenedioxy)phosphoranes with Arylacetylenes: VII. Regiochemistry of Reaction 2,2,2-Tribromo-5-halobenzo[d]-[1,3,2λ5]dioxaphospholes with Arylacetylenes
作者:V. F. Mironov、N. M. Azancheev、R. Z. Musin、A. I. Konovalov
DOI:10.1007/s11176-005-0269-z
日期:2005.4
It was for the first time shown that 2,2,2-tribromo- and 2,2-dibromo-2-fluoro-5-halobenzo[d]-[1,3,2λ5]dioxaphospholes react with arylacetylenes with preferential formation of heterocycles monohalogenated in the benzo fragment, viz. 4-aryl-2-bromo(fluoro)-7-halobenzo[e][1,2]oxaphosphinines. Their structure was established by NMR spectroscopy. By varying in such a way the nature of the halogen at the phosphorus atom one can obtain 6- or 7-halo-substituted regioisomers of benzo[e][1,2]oxaphosphinines.
研究首次表明,2,2,2-三溴和 2,2-二溴-2-氟-5-卤苯并[d]-[1,3,2λ5]二氧膦与芳基乙炔发生反应,优先生成苯并片段单卤化的杂环,即 4-芳基-2-溴(氟)-7-卤苯并[e][1,2]氧膦。它们的结构是通过核磁共振光谱确定的。通过改变磷原子上卤素的性质,可以得到 6-或 7-卤代的苯并[e][1,2]氧膦的再生异构体。