Acylsilanes in Rhodium(III)-Catalyzed Directed Aromatic C-H Alkenylations and Siloxycarbene Reactions with CC Double Bonds
作者:Peter Becker、Daniel L. Priebbenow、Ramona Pirwerdjan、Carsten Bolm
DOI:10.1002/anie.201307446
日期:2014.1.3
siloxycarbenes. However, there are few reports regarding the application of siloxycarbenes in organic synthesis and surprisingly, their reaction with CC double or triple bonds remains virtually unexplored. To facilitate such a study, previously inaccessible aromatic acylsilanes containing an ortho‐tethered CC double bond were identified as suitable substrates. To access these key intermediates, we developed
已知在热或光化学条件下,酰基硅烷会经历1,2-硅-氧迁移,从而形成甲硅烷碳烯。然而,存在关于在有机合成和出人意料的是,它们与下反应siloxycarbenes的应用的报道很少 C双键或三键的几乎保持未知。为了便于这样的研究,含有先前无法芳香族acylsilanes邻拴Ç C双键被确定为合适的底物。为了获得这些关键中间体,我们开发了一种新的合成方法,该方法利用了铑催化的氧化型Heck型烯烃化反应,其中涉及将酰基硅烷部分用作导向基团。当暴露于可见光照射下时,邻位对烯化的酰基硅烷进行了平稳的分子内环化过程,以定量收率提供了有价值的茚满酮衍生物。该结果为开发涉及甲硅烷氧基卡宾中间体的新转化方法铺平了道路。