A Facile Synthesis of Carbamoylsilanes, ‐boranes and ‐phosphane Oxides – Isolation of the First Uncomplexed Carbamoylborane
作者:Yves Canac、Greg E. Aniol、Salvador Conejero、Bruno Donnadieu、Guy Bertrand
DOI:10.1002/ejic.200600799
日期:2006.12
C-(Trimethylsilyloxy)-, C-(triisopropylsilyloxy)-, C-(diphenylboryloxy), C-[bis(diisopropylamino)boryloxy]- and C-(di-tert-butylphosphoryloxy)-N,N-diisopropylaldiminium salts are readily prepared in good to excellent yields from either diisopropylformamide or (chloromethylene)diisopropylammonium chloride. Deprotonation of these aldiminium salts leads to transient (amino)(oxy)carbenes, which cleanly
C-(三甲基甲硅烷氧基)-、C-(三异丙基甲硅烷氧基)-、C-(二苯基硼氧基)、C-[双(二异丙基氨基)硼氧基]-和C-(二叔丁基磷酰氧基)-N,N-二异丙基铝二亚胺盐很容易制备从二异丙基甲酰胺或(氯亚甲基)二异丙基氯化铵中获得良好至极好的收率。这些 aldiminium 盐的去质子化导致瞬态(氨基)(氧)卡宾,其干净地重排为氨基甲酰基衍生物。这种合成方法可以获得空间位阻的氨基甲酰基硅烷、β-硼烷和磷烷氧化物,而其他途径很难获得这些物质。