Abstract
A method for asymmetric and site selective annulations at the γ and γ' positions of cyclic 2-enones with α,β-unsaturated aldehydes has been developed. The organocatalysed [3+3]-annulations proceed with high levels of regio-, diastereo-, and enantioselectivity, affording a series of high value fused carbocycles. Further elaboration gave key lactones (both bridged and fused).
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