Synthesis of the C15–C27 fragment of the antitumor agent laulimalide
作者:E.Kate Dorling、Elisabeth Öhler、Johann Mulzer
DOI:10.1016/s0040-4039(00)00961-8
日期:2000.8
A stereocontrolled synthesis of the C15–C27 fragment of laulimalide is described. Key features are a divergent–convergent synthesis from (R)-glycidol, an interesting formation of a trisubstituted double bond via ring closing metathesis with Grubbs’ ruthenium catalyst and a site selective protection of a syn-1,2-diol.
An improved synthesis of the C15–C28 fragment of laulimalide
作者:A. Sivaramakrishnan、Geoffry T. Nadolski、Ian A. McAlexander、Bradley S. Davidson
DOI:10.1016/s0040-4039(01)02120-7
日期:2002.1
The C15–C28 fragment of the paclitaxel-like antimicrotubule agent laulimalide has been synthesized in 12 linear steps from known epoxide 5, with an overall yield of 16%. The methyldihydropyran ring of the side chain was efficiently prepared using ring-closing olefin metathesis chemistry. The 19,20-diol stereochemistry originates in starting material 7 and the side chain was appended using a Kocienski-modified