反应详情

温度

-70 °C

270 mg (2.14 mmol) of oxalyl chloride in 10 ml of dichloromethane are treated dropwise at −70° C. with 360 mg (4.64 mmol) of dimethyl sulphoxide. The mixture is stirred at −70° C. for 30 min, then 800 mg (1.78 mmol) of 2-(1-hydroxyethyl)-N-{1-[3-(4-methylbenzyl)-5-oxo-4,5-dihydro-1,2,4-triazin-6-yl]ethyl}-5-phenylpentanamide are added. After a further 30 min, during which the temperature in the batch rises to about −60° C., 900 mg (8.92 mmol) of triethylamine are added and the cooling bath is then removed. If the batch temperature has warmed almost to room temperature, 10 ml of water are added and, after stirring briefly, the phases are separated. The dried organic phase is chromatographed in dichloromethane/methanol 50/1.

1. waitAfter a further 30 min
2. customrises to about −60° C.
3. customthe cooling bath is then removed
4. temperatureIf the batch temperature has warmed almost to room temperature
5. addition10 ml of water are added
6. stirringafter stirring briefly
7. customthe phases are separated
8. customThe dried organic phase is chromatographed in dichloromethane/methanol 50/1