Alkyne Cycloadditions Mediated by Tetrabutylammonium Fluoride: A Unified and Diversifiable Route to Isoxazolines and Pyrazolines
作者:Edith Nagy、Salvatore D. Lepore
DOI:10.1021/acs.orglett.7b01401
日期:2017.7.21
isoxazolines and pyrazolines by the cyclization of alkyne substrates using tetrabutylammonium fluoride (TBAF) is described. The reported diheteroatom cycles were produced under mild reactionconditions and with broad product scope. Evidence is also provided for a vinyl anion intermediate produced under unusually mild conditions, which was trapped in situ as part of a tandemcyclization/aldehyde addition sequence
A route to spiroketals using radical translocation
作者:Christopher D.S. Brown、Nigel S. Simpkins、Keith Clinch
DOI:10.1016/s0040-4039(00)60075-8
日期:1993.1
Reaction of beta-iodoenones of general structure 4 with Bu3SnH leads to formation of spiroketal products via 1,5-translocation of the initially formed radical.