Abstract
AbstractThe title compounds (2R,5S,7R)‐1, (2S,5S,7R)‐1, (2R,5R,7S)‐1, and (2S,5R,7S)‐1 were synthesized from ethyl (S)‐lactate (3) and the (R)‐ or (S)‐enantiomers of ethyl 3‐hydroxybutanoate (4a). The formation of the spiro acetal 1 from 2b proceeds stereoselectively. Various spiro acetals with axial S‐chirality at the spiro center were shown to be dextrorotatory at 589 nm.
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