Hydrochloric Acid → 1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride

Participants

Reaction Conditions

Reaction Steps

HCl (939 mg, 4.9 mmol), HOBT (660 mg, 4.9 mmol) and DIPEA (2.2 ml, 12.69 mmol) were added to a solution of the product just obtained in step 4 (1 g, 3.2 mmol) in THF (20 ml). The reaction mixture was stirred at 25° C. for 30 min, a solution of 3-pyridin-4-yl-3,9-diaza-spiro[5.5]undecane (3.2 mmol, 1 eq.) in THF (20 ml) was then added and the mixture was stirred further at 25° C. for 12 h. The reaction mixture was diluted with methylene chloride and washed with sat. NH4Cl solution and NaHCO3 solution. The organic phase was washed with water and sat. NaCl solution, dried over sodium sulfate and concentrated under reduced pressure. The crude product was purified by column chromatography.

Provenance & Evidence