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Total synthesis of Amphoteronolide B (partial):
Reference: Masamune; et al Tetrahedron Lett. 1988, 29, 451. DOI
Keywords: Li-Phosphonate+Aldehyde • CompE+-Aldehyde/CarboxEster+M-R • HWE → Enone (intram) • Lactone-9+ • Alkyl-OH → Ketone • CarboxAcid → CarboxEster •
Reagents: CrO3·Py2 (Collins) • P(O)(OR)2CH2-C(O)R' • Carbodiimide • Carbonate, potassium • Hydroxide, lithium • DMAP • 18-crown-6 •

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