Diastereoselective [2,3]-sigmatropic rearrangements of lithium N-benzyl-O-allylhydroxylamides bearing a stereogenic centre adjacent to the migration terminus
作者:Steven D. Bull、Stephen G. Davies、Sara Hernández Domíngez、Simon Jones、Anne J. Price、Thomas G. R. Sellers、Andrew D. Smith
DOI:10.1039/b207069n
日期:——
3]-sigmatropic rearrangements of lithium N-benzyl-O-allylhydroxylamides bearing a stereogenic centre adjacent to the migrationterminus are examined. (E)-N-Benzyl-O-(4-phenylpent-2-enyl)hydroxylamine rearranges in 30% de to afford syn-(3RS,4RS)-3-(N-benzyl-N-hydroxy)-4-phenylpent-1-ene as the major diastereoisomer, consistent with the rearrangement proceeding under moderate steric control. Rearrangements of both