A short enantioselective synthesis of the macrocyclic core 19 of callyspongiolide, involving a homocrotylboration of aldehyde 4, a Still–Genari olefination, an esterification with alcohol 17, and a ring-closing metathesis, is reported.
A. Urbina, N. Llor, M. V. Barbieri, J. Bosch and M. Amat, Chem. Commun., 2020, 56, 5536 DOI: 10.1039/D0CC01978J
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