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All articles of this category Hydrozirconation of allenylstannane 4 generates ( E ) allylzirconocene species 5 with a γ-Bu 3 Sn substituent. This species reacts with aldehydes and ketones in highly regio- and stereoselective manner, and subsequent in situ-treatment with BF 3 ·OEt 2 (or CF 3 COOH) effects the β-elimination to give terminal 1,3-dienes with high ( E ) selectivity. Mechanistic rationale is proposed for the high geometrical selectivity.
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Maeta et al. (1993) studied this question.
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