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High enantioselectivity is found in the Ti-catalyzed addition of dialkylzinc compounds [R1(CH2)n]2Zn to the β-stannylaldehydes 1 and 2 to give the polyfunctionalized products 3 and 4, respectively. Examples of (CH2)nR1: ethyl, octyl, (CH2)4Cl. R = Me, Bu.
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Brieden et al. (1993) studied this question.
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