反应详情

Batch size: 6.0 g (40 mmol) 3-(3-pyridyl)-acrylic acid, 9.4 ml (110 mmol) oxalyl chloride and 12.4 g (36.5 mmol) 2-[2-(4-diphenylmethyl-piperazin-1-yl)-ethoxy]-ethylamine. The crude product is chromatographically pre-purified over silica gel with CHCl3/CH3OH (98/2 to 95/5). After removal of the solvent, the residue is dissolved in isopropanol and mixed with isopropanolic HCl solution. The mixture is rotated in and the HCl salt is cyrstallized from 50 ml methanol/6 drops diisopropyl ether: Colorless crystals of MP. 157-159° C.; yield 0.6 g (3%).

1. customThe crude product is chromatographically pre-purified over silica gel with CHCl3/CH3OH (98/2 to 95/5)
2. customAfter removal of the solvent
3. dissolutionthe residue is dissolved in isopropanol
4. additionmixed with isopropanolic HCl solution
5. customcrystals of MP. 157-159° C.