Abstract
AbstractTwo alternative approaches to the side‐chain of psymberin (1), psymberic acid (5), have been developed starting from either racemic or enantiopure acetal 6. A five‐step chemoenzymatic route provided the PMB‐protected acid (S,S)‐16 required for the coupling that should ultimately lead to the natural product 1. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
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