Specific Features of Reaction of 2-R-Benzo[e][1,3,2]dioxaphosphinin-4-ones with Perfluorodiacetyl. Synthesis and Steric Structure of 4′,5′-Bis(trifluoromethyl)-4-oxo-2-(2,2,3,3-tetrafluoropropoxy)-2λ 5-spiro[benzo[e][1,3,2]dioxaphosphinine-2,2′-[1,3,2]dioxaphosphole]
作者:I. V. Konovalova、V. F. Mironov、G. A. Ivkova、E. R. Zagidullina、A. T. Gubaidullin、I. A. Litvinov、M. A. Kurykin
DOI:10.1007/s11176-005-0270-6
日期:2005.4
2-R-benzo[e][1,3,2]dioxaphosphinin-4-ones react with perfluorodiacetyl under mild conditions to form relatively labile spirophosphoranes containing a 1,3,2-dioxaphosphole ring. These compounds gradually convert to more stable 2-R-4,5-bis(trifluoromethyl)-1,3,2λ5-dioxaphosphole 2-oxides and diastereometic 2-R-4-(trifluoroacetyl)-4-(trifluoromethyl)benzo[f][1,3,2λ5]dioxaphosphepine 2-oxides, whose structure was confirmed by means of NMR and IR spectroscopy. The structure of 4′,5′ -bis(trifluoromethyl)-4-oxo-2-(2,2,3,3-tetrafluoropropoxy)-2λ 5-spiro[benzo[e][1,3,2]dioxaphosphinine-2,2′-[1,3,2]dioxaphosphole] was confirmed by X-ray diffraction analysis.
在温和的条件下,2-R-苯并[e][1,3,2]二氧磷杂环膦-4-酮与全氟二乙酰基发生反应,生成含有 1,3,2- 二氧磷环的相对易变的螺磷烷。这些化合物逐渐转化为更稳定的 2-R-4,5-双(三氟甲基)-1,3,2λ5-二氧磷环 2-氧化物和非对映的 2-R-4-(三氟乙酰基)-4-(三氟甲基)苯并[f][1,3,2λ5]二氧磷杂菲 2-氧化物,其结构通过核磁共振和红外光谱得到了证实。通过 X 射线衍射分析证实了 4′,5′-双(三氟甲基)-4-氧代-2-(2,2,3,3-四氟丙氧基)-2λ 5-螺[苯并[e][1,3,2]二氧磷杂-2,2′-[1,3,2]二氧磷环]的结构。