Stannyl cyclopropanes by diastereoselective cyclopropanations with (tributylstannyl)-diazoacetate esters catalyzed by Cu(I) N-heterocyclic carbene
by Gawley, Robert E.; Narayan, Sanjay
Catalyzed cyclopropanations of alkenes with Bu3SnC(=N-2)-CO2R (R = 5 Et, t-Bu) have been achieved in good yield with excellent diastereoselectivity to make stannyl cyclopropanes having two or three stereocenters, one of which is quaternary.
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