With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.5464-12-0,1-(2-Hydroxyethyl)-4-methylpiperazine,as a common compound, the synthetic route is as follows.
Example 12(5Z)-5-[(1-{[4-(Methyloxy)-2-(trifluoromethyl)phenyl]methyl}-1H-indazol-5-yl)methylidene]-3-[2-(4-methyl piperazin-1-yl)ethyl]-1,3-thiazolidine-2,4-dione (5Z)-5-[(1-{[4-(Methyloxy)-2-(trifluoromethyl)phenyl]methyl}-1H-indazol-5-yl)methylidene]-3-[2-(4-methylpiperazin-1-yl)ethyl]-1,3-thiazolidine-2,4-dione was prepared from [(5Z)-5-({1-[4-methoxy-2-(trifluoromethyl)benzyl]-1H-indazol-5-yl}methylidene)-2,4-dioxo-1,3-thiazolidine (from Example 8) and 2-(4-methylpiperazin-1-yl)ethanol following General Procedure J.1H NMR (400 MHz, CDCl3): delta 8.15 (d, 1H), 8.09 (m, 1H), 7.92 (s, 1H), 7.56 (dd, 1H), 7.29 (d, 1H), 7.22 (d, 1H), 6.86 (dd, 1H), 6.67 (d, 1H), 5.75 (s, 2H), 3.98 (br, 2H), 3.79 (s, 3H), 3.73 (br, 2H), 3.45 (br, 2H), 3.15 (t, 2H), 2.50 (br, 4H), 2.34 (s, 3H).LC/MS: mass calcd. for C17H28F3N5O3S: 559.19, found 560.3 [M+H]+ General Procedure J. To a mixture of 5-[1-(substituted benzyl)-1H-heteroar-5-ylmethylene]-1,3-thiazolidine-2,4-dione from Procedure E (0.25 mmol), an aliphatic alcohol (0.375 mmol) and Ph3P (0.375 mmol), in THF (2 mL) was added DIAD (0.375 mmol) and the solution was stirred at rt for 2 h. The reaction was concentrated in vacuo and the resultant residue was purified by silica gel chromatography (DCM/MeOH) to afford the desired 5-[1-(substituted benzyl)-1H-heteroar-5-ylmethylene]-(3-alkylated)-1,3-thiazolidine-2,4-dione product, 5464-12-0
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Reference：
Patent; Bignan, Gilles; Cheung, Wing; Gaul, Micheal; Huang, Hui; Li, Xun; Patch, Raymond; Patel, Sharmila; Player, Mark; Xu, Guozhang; Zhao, Bao-Ping; Liu, Jian; US2011/294780; (2011); A1;,
Piperazine – Wikipedia
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