反应详情

温度

68 °C

Dissolve 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-α,α-dimethylbenzeneacetic acid methyl ester (0.131 mol) in methanol (2.5 L) and add 10% sodium hydroxide (769 mL, 1.92 mol). Stir at reflux for 1.5 hours, cool to 68° C. and evaporate the solvent in vacuo to a residue. Add chloroform (1 L) and stir until the solids are dissolved. Separate the organic phase and extract the aqueous phase with chloroform (3×300 mL). Combine the organic phases, dry (MgSO4) and evaporate the solvent in vacuo to give a residue. Treat the residue with ethereal HCl, filter and dry to give the title compound.

1. temperatureat reflux for 1.5 hours
2. customevaporate the solvent in vacuo to a residue
3. stirringAdd chloroform (1 L) and stir until the solids
4. dissolutionare dissolved
5. customSeparate the organic phase
6. extractionextract the aqueous phase with chloroform (3×300 mL)
7. dry with materialCombine the organic phases, dry (MgSO4)
8. customevaporate the solvent in vacuo
9. customto give a residue
10. filtrationfilter
11. customdry