5-Fluoro-2-nitrophenol → (2S,4S)-1-tert-butyl 2-methyl 4-(5-fluoro-2-nitrophenoxy)pyrrolidine-1,2-dicarboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Diethylazodicarboxylate (1.76 ml) was added dropwise to a solution of N-Boc-trans-4-hydroxy-L-proline methyl ester (2.74 g), 5-fluoro-2-nitrophenol (1.47 g) and triphenylphosphine (2.93 g) in dichlormethane under cooling at 0° C. The coolant was removed after 20 min and the reaction mixture was stirred at room temperature over the weekend. The solvent was evaporated and the residue war purified by chromatography to give the desired product.

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