Rhodium(III)-Catalyzed Alkenyl CH Bond Functionalization: Convergent Synthesis of Furans and Pyrroles
作者:Yajing Lian、Tatjana Huber、Kevin D. Hesp、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1002/anie.201207995
日期:2013.1.7
Ring in the new: A new annulation for the efficient synthesis of substituted furans and pyrroles is reported. The RhIII‐catalyzed reaction of O‐methyl α,β‐unsaturated oximes with aldehydes and N‐tosyl imines affords secondary alcohol and amine intermediates, respectively. Cyclization and aromatization occurs under the reaction conditions to provide access to biologically relevant furans and pyrroles
新环:报道了一种有效合成取代呋喃和吡咯的新环。Rh III催化的 O-甲基 α,β-不饱和肟与醛和 N-甲苯磺酰亚胺的反应分别产生仲醇和胺中间体。在反应条件下发生环化和芳构化,以良好的收率获得生物相关的呋喃和吡咯。Cp*=C 5 Me 5,DCE=1,2-二氯乙烷,THF=四氢呋喃。