Stereoselective Peterson Olefinations from Bench-Stable Reagents and<i>N</i>-Phenyl Imines
作者:Manas Das、Atul Manvar、Maïwenn Jacolot、Marco Blangetti、Roderick C. Jones、Donal F. O'Shea
DOI:10.1002/chem.201500475
日期:2015.6.8
The synthesis of bench‐stable α,α‐bis(trimethylsilyl)toluenes and tris(trimethylsilyl)methane is described and their use in stereoselective Peterson olefinations has been achieved with a wide substrate scope. Product stereoselectivity was poor with carbonyl electrophiles (E/Z ∼1:1 to 4:1) though this was significantly improved by employing the corresponding substituted N‐benzylideneaniline (up to 99:1)
描述了台稳的α,α-双(三甲基甲硅烷基)甲苯和三(三甲基甲硅烷基)甲烷的合成,并已在较宽的底物范围内实现了它们在立体选择性Peterson烯烃中的应用。羰基亲电试剂的产物立体选择性差(E / Z约为1:1至4:1),尽管通过使用相应的取代N-苄叉基苯胺(最高达99:1)作为替代亲电试剂可以显着改善。烯化副产物被鉴定为N,N-双(三甲基甲硅烷基)苯胺,很容易通过酸水萃取从产物中分离出来。已经获得了自催化循环的证据。