(S)-2-amino-4-[3-(4-chlorophenoxy)-azetidin-1-yl]-butan-1-ol → 1-{(S)-3-[3-(4-Chloro-phenoxy)-azetidin-1-yl]-1-hydroxymethyl-propyl}-3-(5-ethyl-2-methyl-2H-pyrazol-3-yl)-urea

Participants

Reaction Steps

A solution of (S)-2-amino-4-[3-(4-chloro-phenoxy)-azetidin-1-yl]-butan-1-ol (0.45 g, 2 mmol) and (5-Ethyl-2-methyl-2H-pyrazol-3-yl)-carbamic acid phenyl ester (0.49 g, 1.66 mmol) in DMSO (5 ml) is stirred at ambient temperature for 1 hour, then partitioned between water and ethylacetate. The organic phase is dried over MgSO4 and evaporated. The crude product is purified by recrystallisation from hot ethylacetate to afford 1-{(S)-3-[3-(4-Chloro-phenoxy)-azetidin-1-yl]-1-hydroxymethyl-propyl}-3-(5-ethyl-2-methyl-2H-pyrazol-3-yl)-urea.

Provenance & Evidence