Synthesis of Functionalized Olefins by Cross and Ring-Closing Metatheses
作者:Arnab K. Chatterjee、John P. Morgan、Matthias Scholl、Robert H. Grubbs
DOI:10.1021/ja9939744
日期:2000.4.1
ruthenium-based olefinmetathesiscatalyst 3, which contains a 1,3-dimesityl-4,5-dihydro-imidazol-2-ylidene ligand, was found to efficiently catalyze the cross-metathesis of 1,1-geminally disubstituted olefins.7 Because ruthenium alkylidene 3 displayed unique activity toward previously metathesis-inactive substrates, we decided to investigate the metathesis of α-functionalized olefins. In this communication
The first general synthesis of γ-fluoro α,β-unsaturated aldehydes was achieved from the corresponding silyl dienolethers and N-fluorobenzenesulfonimide (NFSI). The complete selectivity towards the γ position was rationalized thanks to DFT calculations.