Accutof 4g

All manipulations were performed under a nitrogen atmosphere using standard Schlenk techniques. All solvents used for catalysis were dried over and distilled from sodium (toluene, tetrahydrofuran, diethyl ether) or CaH₂ (dichloromethane, methanol, acetonitrile). Diazo compounds and alkenes were degassed using the freeze–thaw–pump method. Acrylates were passed through basic alumina before use to remove radical scavengers. All other chemicals were purchased from commercial suppliers (Sigma Aldrich, Acros or Strem) and used without further purification. NMR spectra (¹H, and ¹³C{1H}) were measured by using a Bruker AV400, AV300, DRX 500 or DRX 300 spectrometer. Unless noted otherwise, the NMR spectra were measured in CDCl₃. Individual peaks are reported as: multiplicity (s=singlet, d=doublet, t=triplet, q=quartet, m=multiplet), integration, coupling constant [Hz]. Mass spectra of the synthesised compounds were recorded by using an Agilent‐5973 GC–MS system, and the corresponding HRMS data were recorded by using a JEOL AccuTOF 4G with a direct injection probe using either EI or ESI. The GC used for isomer separation was a Shimadzu 17A with a Supelco SPB TM‐1 Fused Silica Capillary Column with a length of 30 m, a diameter of 0.32 mm and a film thickness of 2.0 μm.