Diisopropylethylamine → HCID 22644655, compound

Participants

Reaction Steps

Triphosgene (1.6 g) was added to a stirred solution of the product from step (i) (5 g), N,N-diisopropylethylamine (5.2 ml) in tetrahydrofuran (50 ml) at 0° C. The mixture was stirred at room temperature for 16 h, the precipitate filtered and the filtrate evaporated under reduced pressure. Purification was by chromatography eluting with 20% ethyl acetate/toluene. The product was dissolved in dichloromethane then a solution of hydrogen chloride in 1,4-dioxane added. After 2 h the solvent was removed under reduced pressure to yield a solid. Used directly.

Provenance & Evidence