The [3+ 2] annulation reactions of allylic silanes can be utilized to achieve acyclic stereocontrol. This method was employed as a key step in an enantioselective total synthesis of (9 S)-dihydroerythronolide A. The key annulation reaction served to establish most of the stereochemistry of the target, including the two tetrasubstituted carbon stereocenters. The symmetry of the target molecule allowed it to be disconnected into two ...