4668. Herqueinone
Nomenclature
CAS number: 26871-30-7
(7aS,9R)-8,9-Dihydro-4,6,7a-trihydroxy-5-methoxy-1,8,8,9-tetramethyl-3H-phenaleno[1,2-b]furan-3,7(7aH)-dione. C20H20O7; mol wt 372.37.
C 64.51%, H 5.41%, O 30.08%.
Description and references
Red fungal pigment isolated from Penicillium herquei: Stodola et al., Nature 167, 773 (1951); Galarraga et al., Biochem. J. 61, 456 (1955); Harman et al., J. Org. Chem. 20, 1260 (1955). Structure: Cason et al., Tetrahedron 18, 839 (1962); Paul, Sim, Proc. Chem. Soc. London 1962, 352; Cason et al., J. Org. Chem. 35, 179 (1970); J. S. Brooks, G. A. Morrison, Tetrahedron Lett. 1970, 963; eidem, J. Chem. Soc. Perkin Trans. 1 1972, 421; 1974, 2114. Crystal structure and abs config: A. Quick et al., Chem. Commun. 1980, 1051. 13C-NMR study: T. Suga et al., Chem. Lett. 1981 1063.
