Tetrahedron Letters p. 3103 - 3106 (1998)
Update date:2022-08-30
Topics:
Powell, Noel A.
Rychnovsky, Scott D.
Alkynyl diethylalanes and stannanes couple with 4-acetoxy-1,3-dioxane 1 in the presence of BF3 · OEt2 to give acetal protected propargylic anti- 1,3-diols 2 in high yield, with exquisite diastereoselectivity and little acetal epimerization. These propargylic dioxanes 2 are useful intermediates for further diastereoselective reactions.
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