Treatment of an allylic tin-bearing chiral acetal 1a with TiCl4–PPh3 gives the (2S, 3R) isomer 2 with high diastereoselectivity (2 : 3= 93 : 7), whereas the reaction of an allylic silane derivative 1f affords predominantly the (2R, 3S) isomer 3(2 : 3= 37 : 63).
I. Kadota, K. Miura and Y. Yamamoto, J. Chem. Soc., Chem. Commun., 1994, 1953 DOI: 10.1039/C39940001953
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