反应详情

12 g of sodium hydride dispersion (55% strength) are added in portions to 44 g of 5-(2'-aminoethyl)-2,3-dichloro-pyridine and 55 g of 5-hydroxymethyl-3-isopropyl-2-phenyl-oxazolidine, dissolved in 500 ml of 1,2-dimethoxyethane, whilst cooling with ice at 0°-10° C. The reaction mixture is then stirred for 2 hours at room temperature and 16 hours under reflux. Working up gives crude 5-(2'-aminoethyl)-3-chloro-2-[3'-isopropyl-2'-phenyl-oxazolidinyl-(5')]-methoxy-pyridine, which is hydrolysed without further purification, analogously to Example 37), to give 5-(2'-aminoethyl)-3-chloro-2-(3'-isopropylamino-2'-hydroxy-propoxy)-pyridine (boiling point 165°-185° C./0.06 mm Hg).

1. temperaturewhilst cooling with ice at 0°-10° C
2. temperatureunder reflux
3. customWorking up gives crude 5-(2'-aminoethyl)-3-chloro-2-[3'-isopropyl-2'-phenyl-oxazolidinyl-(5')]-methoxy-pyridine, which
4. customis hydrolysed without further purification, analogously to Example 37),