187. P. Müller, G. Bernardinelli, Y.F. Allenbach, M. Ferri, S. Grass,
     “Asymmetric Synthesis of Dihydrofurans via Rh(II)-catalzed Cyclopropanation-Rearrangement of Enol Ethers with Silanyloxyvinyl Diazoacetates”
     Synlett 2005, 1397-1400.

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.

DOI : 10.1055/s-2005-868501 

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