1.1: potassium carbonate; copper / nitrobenzene / 10 h / 200 - 210 °C 1.2: 70 percent / HCl / ethanol / 20 h / Heating 2.1: 55 percent / HBr / acetic acid / 170 h / Heating 3.1: 46 percent / sulfur; iodine / 2.5 h / 120 - 130 °C 4.1: 65 percent / NaOH / H2O / 20 °C View Scheme
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Yamamura, Tatsuo; Suzuki, Kyouichi; Yamaguchi, Tatsuya; Nishiyama, Tomihiro
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Location in patent: Page/Page column 110 ;