426206-55-5Relevant articles and documents
A chemoenzymatic total synthesis of the phytotoxic undecenolide (-)-cladospolide A.
Banwell, Martin G,Loong, David T J
, p. 2050 - 2060 (2004)
An eleven-step synthesis of the title compound (1) from biocatalytically-derived and enantiomerically pure 'building blocks' alcohol (R)-(-)-9 and ester 13 is described. Attempts to construct the twelve-membered lactone ring of cladospolide A in a direct manner by using a ring-closing metathesis (RCM) reaction failed. However, a ten-membered lactone 19, could be constructed by such means and this was then subject to a two-carbon homologation sequence involving, inter alia, Wadsworth-Horner-Emmons and Yamaguchi lactonisation reactions in the closing stages of the synthesis. The impact of substituent stereochemistries and protecting groups on the RCM reaction leading to various ten-membered lactones is also described.
A chemoenzymatic synthesis of the 12-membered macrolide (-)-cladospolide A
Banwell,Jolliffe,Loong,McRae,Vounatsos
, p. 22 - 25 (2007/10/03)
The enantiomerically pure cis-1,2-dihydrocatechol 7, which is obtained by microbial oxidation of chlorobenzene, has been converted, via a sequence of reactions including ring-closing metathesis and Yamaguchi lactonisation steps, into the natural product (-)-cladospolide A (1).