Abstract
A single, convenient reaction protocol and the same set of readily available starting materials suffice for the modular synthesis of all possible polypropionate diastereomers. This general method for the diastereoselective synthesis of syn, anti, and methyl ketone aldol adducts utilizes a powerful MgII -mediated, hydroxy-directed nitrile oxide cycloaddition. The free hydroxy group provides an ideal synthetic handle enabling the rapid assembly of complex polyketide structures. TBS=tBuMe2 Si.
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