1: chlorosulfonic acid / CHCl3 / 3 h / 50 °C 2: 1.) 15percent aq. KOH, 2.) PCl5 3: 0.5 h / 40 °C View Scheme
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Pharmaceutical Chemistry Journal, 1983 , vol. 17, # 6 p. 410 - 414
Khimiko-Farmatsevticheskii Zhurnal, 1983 , vol. 17, # 6 p. 685 - 688
1: 4-methoxy-aniline With hydrogenchloride; sodium nitrite T=0 - 5°C; 2: furan-2-carboxylic acid With copper dichloride in water T=20°C; 4 h; Further stages.;
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Cui, Zi-Ning; Shi, Yan-Xia; Cui, Jing-Rong; Ling, Yun; Li, Bao-Ju; Yang, Xin-Ling
Chemical Biology and Drug Design, 2012 , vol. 79, # 1 p. 121 - 127