Tetrahedron Letters p. 8241 - 8244 (1997)
Update date:2022-07-30
Topics:
Paterson, Ian
Oballa, Renata M.
The C1-C15 aldehyde 3, containing the AB-spiroacetal of spongistatin 1 (1), was prepared in 17 steps from methyl ketone (S)-8. The C15 and C16 stereocentres could be introduced together, relying on Felkin-Anh control, by using a boron-mediated, anti aldol coupling reaction, as in 22 → 25 and 26.
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