First Generation Retrosynthetic Analysis of FR901464
Total syntheses, fragmentation studies, and antitumor/antiproliferative activities of FR901464 and its low picomolar analogue
Scheme 1
Scheme 1 shows our first generation retrosynthetic analysis of FR901464. We envisioned a Nozaki-Hiyama-Kishi (NHK) reaction of 1 and 2 as the final coupling reaction because the reaction conditions are mild and it is generally in accordance with Felkin selectivity for additions to R-chiral aldehydes. Vinyl iodide 1 would be prepared from acid 3 and amine 4 that were expected to be derived from propargylic alcohol 6 and the L-threonine derivative 7, respectively. Ketoaldehyde 2 could be prepared from allylic alcohol 5 by oxidative cleavages of both olefins. Finally, this alcohol would arise from epoxyalcohol 8.
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