Synthetic Studies of Rifamycins. VII. A Facile Synthesis of the Aromatic Chromophore of Rifamycin S through a Rifamycin W Aromatic Segment
作者:Masaya Nakata、Shigeru Wada、Kuniaki Tatsuta、Mitsuhiro Kinoshita
DOI:10.1246/bcsj.58.1801
日期:1985.6
The intact aromatic chromophore of rifamycin S, 7-amino-2,5-dihydroxy-2,4-dimethyl-naphtho[2,1-b]furan-1,6,9(2H)-trione, was synthesized through the rifamycin W aromatic segment, 1-[5,8-dimethoxy-2,4-bis(methoxymethoxy)-3-methyl-6-nitro-1-naphthyl]-1-propanone which was prepared in 9 steps and 29.6% overall yield from 2,6-bis(benzyloxy)-3,5-dibromotoluene and furan.
利福霉素 S,7-氨基-2,5-二羟基-2,4-二甲基-萘并[2,1-b]呋喃-1,6,9(2H)-三酮的完整芳香族发色团,通过利福霉素合成W芳族链段,1-[5,8-二甲氧基-2,4-双(甲氧基甲氧基)-3-甲基-6-硝基-1-萘基]-1-丙酮分9步制备,总产率为29.6% 2,6-双(苄氧基)-3,5-二溴甲苯和呋喃。