Formaldehyde → HCID 12084899, compound

Participants

Reaction Steps

In toluene (250 mL) were suspended tert-butoxycarbonyl-L-alanine (18.9 g), paraformaldehyde (6.70 g) and p-toluenesulfonic acid monohydrate (0.19 g), and the suspension was heated at reflux while removing water produced. At the end of the reaction, the mixture was cooled to room temperature, washed with saturated aqueous sodium hydrogen carbonate solution and saturated saline. The toluene solution was dried over anhydrous sodium sulfate. The solvent was evaporated under a reduced pressure, and the crystals obtained were filtered to give the title compound (14.2 g) white crystals in a yield of 71%.

Provenance & Evidence