Triethylamine → (2S,4R)-N-allyloxycarbonyl-4-methanesulfonyloxyproline methyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of (2S,4R)-1-allyloxycarbonyl-2-methoxycarbonyl-4-hydroxypyrrolidine (210.2 g) and triethylamine (150.2 ml) in dichloromethane (2 l) was added dropwise methanesulfonyl chloride (70.7 ml) at 0° C. After stirring for 1 hour at 0° C., the reaction mixture was washed with brine, dried over magnesium sulfate and evaporated in vacuo to give (2S,4R)-1-allyloxycarbonyl-2-methoxycarbonyl-4-methanesulfonyloxypyrrolidine (281.8 g).

Provenance & Evidence