Tandem Catalysis: Generating Multiple Contiguous Carbon−Carbon Bonds through a Ruthenium-Catalyzed Ring-Closing Metathesis/Kharasch Addition
作者:Benjamin A. Seigal、Cristina Fajardo、Marc L. Snapper
DOI:10.1021/ja055806j
日期:2005.11.23
0], and [5.3.0] ring systems in one step from the appropriately functionalized acyclic precursors. For substrates where the intramolecular Kharasch addition fails, an intermolecularKharasch addition is possible. By combining the intra- and intermolecularKharasch additions with RCM, three new contiguous carbon-carbon bonds with multiple stereocenters can be generated by the ruthenium catalyst in a controlled
A three-step tandem process for the synthesis of bicyclic γ-lactams
作者:Fiona I. McGonagle、Lindsay Brown、Andrew Cooke、Andrew Sutherland
DOI:10.1039/c004695g
日期:——
A one-pot, three-step tandem process has been developed for the direct synthesis of functionalised bicyclic [3.3.0], [4.3.0] and [5.3.0] γ-lactams from simple allylic trichloroacetimidates. The process involves a palladium(II) mediated Overman rearrangement followed by the use of Grubbs first generation complex which catalyzes both a ring closing metathesis reaction and a Kharasch cyclization. As well