The super silyl group governs high diastereoselectivity and yields for a sequential aldol-polyhalomethyllithium addition reaction. This unique silyl group is necessary to obtain the diastereoselectivities associated with this sequential reaction, capable of generating two new stereocenters. Alpha-polyhalomethylcarbinols are generated with the simple and inexpensive dihalomethanes and trihalomethanes.
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Boxer et al. (2008) studied this question.
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