Enantioselective cyclopropylation of various aldehydes proceeds using dicyclopropylzinc in the presence of a catalytic amount of chiral amino alcohol or thiophosphoramidate with Ti(OPri)4 to provide enantiomerically enriched cyclopropyl alkanols (up to 96.6% ee).
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Shibata et al. (1998) studied this question.
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