Pyrrolidine → 1-(5-Chloro-2-nitrobenzyl)pyrrolidine

Pyrrolidine (4 mL, 48.5 mmol) was added to a solution of 5-chloro-2-nitrobenzaldehyde (6 g, 32.2 mmol) in dichloromethane (150 mL) and the solution was stirred at room temperature for 30 minutes. The solution was then cooled in ice, and sodium triacetoxyborohydride (10.3 g, 48.5 mmol) was added portionwise. Once addition was complete, the reaction was stirred at room temperature for 4 hours. The reaction was washed with sodium carbonate solution, dried over MgSO4 and evaporated under reduced pressure. The residual oil was purified by column chromatography on silica gel using ethyl acetate:pentane (86:14) to afford the title compound as a pale yellow solid, 6.3 g.

1. temperatureThe solution was then cooled in ice
2. additionOnce addition
3. stirringthe reaction was stirred at room temperature for 4 hours
4. washThe reaction was washed with sodium carbonate solution
5. dry with materialdried over MgSO4
6. customevaporated under reduced pressure
7. customThe residual oil was purified by column chromatography on silica gel

ORD-Eintrag

ord-316009a3be204a12ba994ecef51047aa

Quelldatensatz

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07745630B2