Studies on the Synthesis of <i>trans</i>-Dihydrodiols of Polycyclic Aromatic Thiaarenes as Potential Proximate Carcinogenic Metabolites: First Synthesis of <i>trans</i>-10,11-Dihydroxy-10,11-dihydroacenaphtho[1,2<i>-b</i>]benzo[<i>d</i>]thiophene and 6,7-Dihydroxy-6,7-dihydronaphtho[1,2<i>-b</i>]thiophene
作者:Jayanta K. Ray、Susmita Gupta、Gandhi K. Kar、Bidhan C. Roy、Jyh-Ming Lin、Shantu Amin
DOI:10.1021/jo005502+
日期:2000.12.1
(5) produced the phenolic compound 6 in 97% yield. Oxidation of the phenol with phenyl iododiacetate followed by hydrolysis of the o-quinone monoketal 7 gave the o-quinone (8) in 86% yield. Stereoselective reduction of 8 with NaBH(4)/EtOH under oxygen afforded trans-10,11-dihydroxy-10,11-dihydroacenaphtho[1,2-b]benzo[d]thi oph ene(9) (orange yellow solid) in 55% yield. Compound 16 was obtained as a colorless
发现聚芳族噻吩化合物与许多煤衍生产品和页岩油同时出现,并且被认为是诱变剂和/或致癌物。从8,9-二氢ena并[1,2-b]苯并[d]噻吩(1)和7-甲氧基萘[1,2-]开始的五个或四个步骤中,完成了两个标题化合物9和16的首次合成。 b]噻吩(12)。将化合物1转化为顺式二醇(11)(通过OsO(4)/吡啶处理)或反式二醇(3)[通过Prevost反应(PhCOOAg / I(2)),然后水解]在95-产率分别为98%。随后使二醇脱水(PTS /苯),然后将所得酮(5)芳构化,以97%的收率得到酚类化合物6。用碘代二乙酸苯酯氧化苯酚,然后水解邻醌单缩酮7,得到邻醌(8),产率为86%。在氧气下用NaBH(4)/ EtOH选择性立体还原8,得到的反式-10,11-二羟基-10,11-二氢ac [1,2-b]苯并[d]噻吩(9)(橙色黄色固体) 55%的产率。通过立体选择性还原邻苯二酚15(使