反应 #3683836
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openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US05057535
反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: A mixture of 1-(2,3-dimethylphenyl)-1-propanone (11.2 g), paraformaldehyde (2.70 g), pyrrolidine-hydrochloride (9.7g), and hydrochloric acid (0.5 ml) in isopropyl alcohol (15 ml) was refluxed for 8.5 hours. The reaction mixture was evaporated in vacuo to give the residue. The residue was dissolved in water and then washed with ethyl acetate. The aqueous layer was extracted with dichloromethane and then dried over anhydrous magnesium sulfate. The mixture was filtered and then the filtrate was evaporated in vacuo to give the residue. The residue was recrystallized from CH2Cl2 - AcOEt to give 2-methyl-1-(2,3-dimethylphenyl)-3-pyrrolidino-1-propanone hydrochloride (13.1 g, Y: 64.7%) as colorless prisms, m.p. 149°-151° C. IR ν (the free base)maxneat : 1690 cm-1 ##STR323## was refluxed for 8.5 hours The reaction mixture was evaporated in vacuo to give the residue washed with ethyl acetate The aqueous layer was extracted with dichloromethane dried over anhydrous magnesium sulfate The mixture was filtered the filtrate was evaporated in vacuo to give the residue The residue was recrystallized from CH2Cl2 - AcOEt
来源 ID: ord-c280d2d08684449bb6a22c0779f86dd4