widely distributed structural pigments of the sea urchins (echinoids) one (spinochrome B) is a derivative of juglone, while four (spinochromes A, C, D, and E) are derivatives of naphthazarin. In addition to the two peri OH groups of naphthazarin these compounds bear one or more β-hydroxyls and/or an acetyl side chain. The synthesis of these four naphthazarin derivatives is described. The naphthalene skeleton
484. Quinones. Part VI. Some new polyhydroxynaphthaquinones
作者:J. F. Garden、R. H. Thomson
DOI:10.1039/jr9570002483
日期:——
ECHAVARREN, A.;FARINA, F.;PRADOS, P., AN. QUIM. PUBL. REAL SOC. ESP. FIS. Y QUIM., 1980, 76, N 3, 222-225
作者:ECHAVARREN, A.、FARINA, F.、PRADOS, P.
DOI:——
日期:——
Regiospecific synthesis of mono- and bicyclic 6-alkoxy-2-pyrones and their use in the preparation of substituted aromatics, anthraquinones, and tetracyclic intermediates for 11-deoxyanthracycline synthesis
作者:Michael E. Jung、John A. Lowe、Mark A. Lyster、Manabu Node、Rudolf W. Pfluger、Richard W. Brown
DOI:10.1016/s0040-4020(01)91537-6
日期:1984.1
chrysophanol, helminthosporin, pachybasin, 2-acetylemodin and the purported structure for orientalone. The utility of this approach for the synthesis of the anthracyclines is demonstrated by its use in the preparation of various tetracyclicintermediates for anthracycline synthesis.