title: Synthesis of the furo[2,3-b]chromene ring system of hyperaspindols A and B.
abstract: The synthesis of the unique furo[2,3-b]chromene ring system found in hyperaspidinols A and B, acylphloroglucinols from Hypericum chinense has been achieved in twelve steps. By comparison of the NMR spectra of the synthesized compounds with those of the natural products, a relative stereochemistry is suggested, especially that of the ketal carbon.
authors: School of Chemical Sciences, University of Auckland, 23 Symonds St, Auckland, New Zealand.
authors: Danielle L
authors: DL
authors: Paterson
authors: School of Chemical Sciences, University of Auckland, 23 Symonds St, Auckland, New Zealand.
authors: David
authors: D
authors: Barker
keywords: acylphloroglucinols; bicyclisation; furo[2,3-b]chromene; fused ketal