[structure: see text] A completely stereocontrolled approach to assembly of the major C1-C28 subunit of spongistatin 1 (altohyrtin A) is described. Key steps included the control of two asymmetric aldols by means of Fujita-Nagao (chiral N-acyl-1,3-thiazolidine-2-thione auxiliary) and Mukaiyama (BF3 x OEt2-promoted enolsilane coupling) protocols in complex settings.
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Zuev et al. (2000) studied this question.
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