Kimura, Michio; Okabayashi, Ichizo, Chemical and pharmaceutical bulletin, 1983, vol. 31, # 9, p. 3357 - 3359
作者:Kimura, Michio、Okabayashi, Ichizo
DOI:——
日期:——
KIMURA MICHIO; OKABAYASHI ICHIZO, CHEM. AND PHARM. BULL., 35,(1987) N 1, 136-141
作者:KIMURA MICHIO、 OKABAYASHI ICHIZO
DOI:——
日期:——
KIMURA MICHIO, J. HETEROCYCL. CHEM., 24,(1987) N 1, 283-288
作者:KIMURA MICHIO
DOI:——
日期:——
Kimura, Michio, Journal of Heterocyclic Chemistry, 1987, vol. 24, p. 283 - 288
作者:Kimura, Michio
DOI:——
日期:——
Spirolactones of xanthene. IV New method of xanthone synthesis by oxidation of novel spirolactones of dibenzo[c,h]xanthene and xanthenes.
作者:MICHIO KIMURA、ICHIZO OKABAYASHI
DOI:10.1248/cpb.35.136
日期:——
Dibenzo [c, h] xanthone and halogen-and methyl-substituted xanthones have been synthesized by the oxidation of novel spirolactones of dibenzo [c, h] xanthene and xanthene, which were prepared by a new condensation reaction of 1-naphthol or phenol derivatives with oxalic acid in the presence of sulfuric acid. The oxidation was carried out by using potassium permanganate in the presence of aqueous potassium hydroxide. The dibenzo [c, h] xanthone and xanthones were identical with samples obtained by another synthetic route.