Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 711007-44-2, name is 2,3-Diaminobenzamide, This compound has unique chemical properties. The synthetic route is as follows., 711007-44-2
At room temperature, 2,3-diaminobenzamide (500 mg, 3.30 mmol) and 1-N-Boc-4-piperidinecarboxaldehyde (776 mg, 3.63 mmol) were initially charged in DMA (dimethylamide). With vigorous stirring, sodium bisulfite (585 mg, 5.62 mmol) was added at room temperature, and the reaction solution was then stirred at 130 C. for 5 h. After cooling to room temperature, water was added and the reaction mixture was repeatedly extracted thoroughly with dichloromethane The combined organic phases were then dried over magnesium sulfate, filtered off, concentrated under reduced pressure and then purified by column chromatography (gradient ethyl acetate/heptane). This gave tert-butyl 4-(4-carbamoyl-1H-benzimidazol-2-yl)piperidine-1-carboxylate (1.0 g, 88% of theory) in the form of a colorless solid. 1H-NMR (400 MHz, CDCl3 delta, ppm) 9.70 (br. s, 1H, NH), 8.10 (s, 1H), 7.60 (s, 1H), 7.30 (t, 1H), 5.90 (br. s, 1H, NH), 3.12 (m, 1H), 2.10 (m, 2H), 1.90 (m, 2H), 1.65 (m, 4H), 1.50 (s, 9H).
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Reference:
Patent; BAYER CROPSCIENCE AG; Frackenpohl, Jens; Heinemann, Ines; Mueller, Thomas; Dittgen, Jan; Von Koskull-Doering, Pascal; Schmutzler, Dirk; Hills, Martin Jeffrey; US2015/216168; (2015); A1;,
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