Two Sterically Encumbered 1,3,2-Dioxaphospholanes – Reactions, Comparison of Crystal Structures and Computational Explanations
作者:Matthias Freytag、Jörg Grunenberg、Peter G. Jones、Reinhard Schmutzler
DOI:10.1002/zaac.200700514
日期:2008.7
which the reactive PIII-center lies close to the sterically demanding Mes* group (Mes* = 2,4,6-tri-tert-butylphenyl), were prepared from Mes*–Br and the corresponding P-chloro-phospholane. Compounds 2 and 4 reacted with various oxidants, azides, MeSO3CF3 or [(tht)AuCl] (tht = tetrahydrothiophene) to give the expected products. All crystal structures of the products display a strongly distorted Mes*
3,4,5,6-四氯苯并-3-(2,4,6-三叔丁基苯基)-1,3,2-二氧杂膦烷(2)和苯并-3-(2,4,6-三-叔丁基苯基) -1,3,2-二氧杂磷杂环戊烷 (4),其中反应性 PIII 中心靠近空间要求高的 Mes * 基团(Mes * = 2,4,6-三叔丁基苯基),是由 Mes * -Br 和相应的对氯膦烷制备。化合物 2 和 4 与各种氧化剂、叠氮化物、MeSO3CF3 或 [(tht) AuCl](tht = 四氢噻吩)反应得到预期产物。产品的所有晶体结构都显示出强烈扭曲的 Mes * 系统,具有苯环的船形构象,磷和邻叔丁基在环的两侧有明显的平面外偏差。