Abstract
A novel three step asymmetric annulation procedure comprises a tandem catalytic enantioselective 1,4-addition-allylic substitution, Grignard addition and ring closing metathesis (RCM) sequence to provide [6,6], [7,6], [8,6] and [6,7] bicyclic products with ee’s of 93–97% in which the size of both rings can easily be varied independent of each other.
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