4-Methylmorpholine → Boc-gly-pro-OH

Participants

Reaction Steps

1.4 ml (11 mmol) of N-methylmorpholine are added to 1.15 g (10 mmol) of proline in 50 ml of DMF. The mixture is cooled with an ice bath, 3.06 g (10 mmol) of Boc-Gly-OSu are then added and the pH is adjusted to between 6 and 7 throughout the reaction (14 h) by successive additions of small amounts of N-methylmorpholine (this substance is used as a proton acceptor). The DMF is evaporated off and the evaporation residue is taken up with AcOEt; after precipitation in petroleum ether and then filtration, the expected product is collected.

Provenance & Evidence