反应详情

温度

-30 °C

Nitrosonium tetrafluoroborate (9.32 g, 79.8 mmol) was added carefully in several portions to a cooled (−30° C.) solution of N-(tert-butoxycarbonyl)cyclopropylamine (9.57 g, 60.9 mmol) and anhydrous pyridine (11.7 mL) in dry acetonitrile (150 mL). The solution was stirred at −30° C. for 30 minutes, and then at 0° C. for 2 hours. Ice water and EtOAc were added and the organic phase was separated and washed quickly with 1N HCl to remove pyridine. The organic phase was washed with 1N NaHCO3 and brine, dried (MgSO4), filtered, and evaporated under high vacuum with a water bath temperature below 40° C. to give N-nitroso-N-(tert-butoxycarbonyl)amino-cyclopropane (12.1 g, quantitative) as an oil.

1. waitat 0° C. for 2 hours
2. customthe organic phase was separated
3. washwashed quickly with 1N HCl
4. customto remove pyridine
5. washThe organic phase was washed with 1N NaHCO3 and brine
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. customevaporated under high vacuum with a water bath temperature below 40° C.