反应详情

The product of Step 3 (150 mg, (0.49 mmol) was heated at reflux in ethanol (10 ml) containing 50% aqueous hydroxylamine (1 ml) for 2 hours. The solution was concentrated in vacuo to an oil and purified by silica gel chromatography eluting with 1:9:90.880 ammonia:ethanol:dichloromethane to afford the title product (128 mg, 81%); MS(ES+) m/e 321 [M+H]+.

1. concentrationThe solution was concentrated in vacuo to an oil
2. custompurified by silica gel chromatography
3. washeluting with 1:9:90.880 ammonia