摘要：

The highly diastereoselective [4 + 2] cycloaddition of 1-methoxybuta-1,3-diene (3) to (2R)-N-glyoxyloylbornane-10,2-sultam (2) afforded the adduct (4) which was effectively transformed into (4R,6S)-4-hydroxy-6-hydroxymethyltetrahydro-2-pyrone (1), a key synthon for the lactone moiety of compactin and mevinolin.

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