[reaction: see text] Vinylogous Mukaiyama aldol reactions employing silyloxyfurans and substituted cyclic ketones are described. These annulations proceed with moderate to good diastereoselectivity. The potential application of this process to the synthesis of butenolide and gamma-lactone containing natural products was demonstrated by further transformations of the addition products.
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Kong et al. (2006) studied this question.
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