Reaktion #74737

Reaktionsgleichung

potassium bicarbonate

hexamethylphosphoramide

acetonitrile

benzhydryl bromide

→

title compound

1-benzhydryl-2-(α-hydroxybenzyl)piperidine

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturReflux under an inert atmosphere for 190 hrs
2. 2
   workup.ADDITIONa stirred suspension of 1.89 g
3. 3
   Extraktionextract with ether
4. 4
   WaschenWash the
5. 5
   Extraktionextract successively with water and brine
6. 6
   Trocknendry over anhydrous sodium sulfate
7. 7
   FiltrationFilter
8. 8
   Waschenwash the resultant precipitate with acetone

Vorschrift

Reflux under an inert atmosphere for 190 hrs. a stirred suspension of 1.89 g. of erythro-α-(2-piperidyl)phenylmethanol, 2.25 g. of benzhydryl bromide, and 1.00 g. of potassium bicarbonate in 100 ml. of dry acetonitrile containing 14 ml. hexamethylphosphoramide. Cool to room temperature, pour into water, and extract with ether. Wash the extract successively with water and brine and dry over anhydrous sodium sulfate. Acidify the dry ether solution with 4.4 ml. of 1.9 M ethereal HCl. Filter and wash the resultant precipitate with acetone to obtain the analytically pure hydrochloride salt of the title compound, m.p. 232.5°-234° dec.

Quelle