反应详情

6.45 g crude N′,2-dihydroxypropanimidamide was cooled on an ice-bath with 23.5 mL DEA in THF (200 mL). To this slurry 21.94 g 3-chlorobenzoyl chloride was added. The mixture was warmed to r.t. and stirred for 2 h. Addition of Et2O (200 mL), washing with sat. aq. NH4Cl and re-extraction of the aq. layer gave after combining and concentration of the org. layers followed by drying in vacuo 27.24 g of crude title compound, which was used directly in the next step for 1-[5-(3-chlorophenyl)-[1,2,4]oxadiazol-3-yl]ethanol. LC-MS (M++1): 243

1. washwashing with sat. aq. NH4Cl and re-extraction of the aq. layer
2. customgave
3. dry with materialby drying in vacuo 27.24 g of crude title compound, which