反应 #1340629

反应方程式

HCl

methyl[(4E)-4-[1-(benzylamino)-2-(4-methoxyphenyl)ethylidene]-1-(2-chlorophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-3-yl]acetate

sodium

i-PrOH

→

pure product

收率 14.0%

5-benzyl-2-(2-chlorphenyl)-4-(3-methoxybenzyl)-1H-pyrazolo[4,3-c]pyridine-3,6(2H,5H)-dione

收率 14.0%

反应条件

后处理

1. 1
   温度cooled
2. 2
   其他i-PrOH were removed in vacuo
3. 3
   其他the crude was purified by flash chromatography

实验过程

An isopropanolic solution of i-PrONa, obtained by dissolving of sodium (0.017 g, 0.75 mmol, 2 equiv.) in i-PrOH (2 ml), was treated with methyl[(4E)-4-[1-(benzylamino)-2-(4-methoxyphenyl)ethylidene]-1-(2-chlorophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-3-yl]acetate (Compound of Formula (VIII) (170 mg, 0.36 mmol, 1 equiv.). The reaction mixture was stirred at room temperature for 0.5 h, then cooled and neutralized to pH 6 by addition 1M HCl solution. i-PrOH were removed in vacuo and the crude was purified by flash chromatography to yield 24 mg of pure product 5-benzyl-2-(2-chlorophenyl)-4-(3-methoxybenzyl)-1H-pyrazolo[4,3-c]pyridine-3,6(2H,5H)-dione. Yield 14%. 1HNMR (500 MHz, DMSO-d6): 3.69 (s, 3H); 4.40-4.60 (m, 2H); 5.08-5.24 (m, 2H), 5.72 (s, 1H); 6.71-6.73 (m, 2H), 6.80-6.82 (m, 1H); 7.02-7.03 (m, 2H); 7.21-7.25 (m, 3H); 7.28-7.31 (m, 3H); 7.47-7.49 (m, 2H); 7.62-7.66 (m, 2H). MS (ESI+): 472.9; MS (ESI−): 470.7.

来源