Yellow Pigments of Aspergillus niger and Aspergillus awamori
Yellow Pigments of Aspergillus niger and Aspergillus awamori
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黑曲霉和泡盛曲霉的黄色素
DOI:
10.1271/bbb1961.30.683
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发表时间:
1966
期刊:
影响因子:
--
通讯作者:
Hiroshi Tanaka
中科院分区:
文献类型:
--
作者:
P. Wang;Hiroshi Tanaka
Alkaline degradation of Aurasperone A, C32H26O10, gave a binaphthyl (IIa), m.p. 255°C and acetone. (IIa) afforded a tetraacetate (IIb), C32H30O12 m.p. 219°C and a tetramethyl ether (IId), C28H30O8, m.p. 188°C. These facts along with the NMR spectra of aurasperone A and (IIb) confirm that aurasperone A is a dimeric 2-methyl-5-hydroxy-6,8-dimethoxy-4H-naphtho[2,3-b]pyran-4-one with asymmetric C-C linkage (7-10′ or 9-10′). The ether (IId) is not identical with 1,1′ ,3,3′ „6,6′ ,8,8′-octamethoxy-4,4′-binaphthyl. Thus, it follows that (IId) is a 2,4′-binaphthyl and hence aurasperone A is 2,2′-dimethyl-5,5′- dihydroxy-6,6′,8,8′-tetrahydroxy-7,10′-bi[4H-naphtho[2,3-b]pyran-4-one] (I).