反应详情

To triethyl orthoformate (10 ml) was added 3-amino-5-(1-(3-benzoylphenyl)ethyl)-1,2,4-oxadiazole (0.30 g, 1.02 mmol). After reflux for 4.5 h, the mixture was evaporated under reduced pressure to a residue, which was extracted with dichloromethane after saturated NaHCO3 aq. was added. The extracts were washed with water, evaporated under reduced pressure to a residue, which was chromatographed to afford 3-methylamino-5-(1-(3-(α-hydroxybenzyl)phenyl)ethyl)-1,2,4-oxadiazole (0.15 g, 48% yield) as oily substance: NMR(CDCl3)δ 1.63(d, 3H), 2.82(d, 4H), 4.18(q, 1H), 4.20(m, 1H), 5.73(d, 1H), 7.33-7.42(m, 9H) ppm: IR(neat) 3430, 3330, 3040, 1600, 1490, 1450, 1340, 1320, 1150 cm-1.

1. temperatureAfter reflux for 4.5 h
2. customthe mixture was evaporated under reduced pressure to a residue, which
3. extractionwas extracted with dichloromethane after saturated NaHCO3 aq.
4. additionwas added
5. washThe extracts were washed with water
6. customevaporated under reduced pressure to a residue, which
7. customwas chromatographed