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α-Alkylation of carbonyl compounds (1) via the corresponding base cannot be used for the introduction of tert-alkyl groups. This important CC coupling reaction has now been accomplished by a route involving (2), which is allowed to react with tert-alkyl chloride in the presence of TiCl4, FeCl3, or ZnCl2.
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Reetz et al. (1978) studied this question.
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