Enantioselective [2,3] sigmatropic rearrangement mediated by a butyllithium–chiral ligand complex
作者:Shino Manabe
DOI:10.1039/a700906b
日期:——
The first enantioselective [2,3] sigmatropic rearrangement of acyclic
diprop-2-ynyl ethers and alkenyl benzyl ethers is achieved by a
BuLiâchiral ligand complex.
synthesis of clavaminol A and C, (2R,3S)-2-amino-3-alkanols from the Mediterranean ascidian Clavelina phlegraea has been achieved in 29% overall yield. The key step involved a palladium(II)-catalyseddirected Overman rearrangement to create the C–N bond and install the erythro configuration while a one-pot, tributyltin hydride-mediated reduction allowed simultaneous formation of the methyl side-chain