Dichloromethane → cyclopropyl-(R)-pyrrolidin-2-yl-methanol

Participants

Reaction Steps

To a solution of (R)-2-formyl-pyrrolidine-1-carboxylic acid tert-butyl ester (200 mg, 1 mmol) in tetrahydrofuran at −78° C. was added a 1 M solution of cyclopropylmagnesium chloride (1.3 ml, 1.3 mmol). After stirring for 1 h at room temperature and addition of aqueous sodium hydrogencarbonate, extraction (3 times with dichloromethane), drying of the combined organic layers over sodium sulfate and evaporation of the solvents the crude product was heated with aqueous sodium hydroxide at 100° C. for 3 days to give 20 mg of crude cyclopropyl-(R)-pyrrolidin-2-yl-methanol which was used in the next step without further purification.

Provenance & Evidence