反应详情

温度

0 °C

Alternatively, a solution of 17β-carboxy-6-t-butylcarboxy-6-azaandrost-4-en-3-one (260 mg, 0.62 mmol), example 3, Part F, is dissolved in toluene (10 mL) and treated with pyridine (3 eq) and catalytic dimethylformamide, cooled to 0° C., and thionyl chloride added (80 μL, 1.10 mmol). The reaction is then allowed to warm to room temperature and is stirred for 1 hr. The solids are then removed by filtration, the solution concentrated, the resulting crude acid chloride dissolved in THF (6 mL), CuL added (120 mg, 0.62 mmol), cooled to -78° C. and treated with isobutylmagnesium bromide (2.0M in diethyl ether, 0.5 mL, 1 mmol). The reaction is allowed to warm to room temperature, stirred for 30 min and is worked up as in Part C above to give 17β-(1-oxo-3-methylbutyl)-6-azaandrost-4-en-3-one.

1. temperatureto warm to room temperature
2. customThe solids are then removed by filtration
3. concentrationthe solution concentrated
4. dissolutionthe resulting crude acid chloride dissolved in THF (6 mL)
5. additionCuL added (120 mg, 0.62 mmol)
6. temperaturecooled to -78° C.
7. temperatureto warm to room temperature
8. stirringstirred for 30 min