All articles of this category Metalation of alk-1-enes, using the mixture of butyllithium and potassium tert -butoxide in tetrahydropyran, followed by stereohomogenization and ultimate treatment with chlorotrimethylsilane afforded a series of alk-2-enyltrimethylsilanes in good yield and with ( Z/E ) ratios ranging from 95:5 to 98:2. The deprotonation of propene can be rapidly and readily accomplished with a stoichiometric amount of the superbase suspended in pentane on a 1 mol scale. allylpotassium - metalation of terminal olefins - superbases - allyl type silanes - stereoselectivity
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Desponds et al. (1997) studied this question.