Abstract
The C 15–C 28 fragment of the paclitaxel-like antimicrotubule agent laulimalide has been synthesized in 12 linear steps with an overall yield of 14%. The methyldihydropyran ring of the side chain was efficiently prepared using ring-closing olefin metathesis chemistry and the 19,20- syn-diol was generated through the addition of a mixed vinyl zincate to a protected α-hydroxyaldehyde.
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