Asymmetric Synthesis of Dihydrofurans via Rh(II)-Catalyzed Cyclopropanation-Rearrangement of Enol Ethers with 1-(Silanyloxy)vinyl Diazoacetates
作者:Paul Müller、Gérald Bernardinelli、Yves F. Allenbach、Maria Ferri、Stéphane Grass
DOI:10.1055/s-2005-868501
日期:——
The cyclopropanation of dihydrofuran and dihydropyran with methyl 1-(silanyloxy)vinyl diazoacetates in the presence of chiral Rh(II)-catalysts affords cyclopropanes with high diastereo- and enantioselectivitiy. The cyclopropanes, in turn, rearrange to dihydrofurans upon desilylation with TBAF.