1-Hydroxybenzotriazole → HCID 54289105, compound

Participants

Reaction Steps

To a stirred solution of 3-[2-(tert-butoxycarbonyl-pyridin-4-yl-amino)-ethoxy]-5-chloro-benzoic acid (0.104 g), TBTU (0.128 g), and HOBt (0.061 g) in DMF (1 ml) was added DIPEA (0.139 ml) and 5-(2-isopropylamino-ethyl)-[1,2,4]oxadiazol-3-ylamine (0.05 g). The reaction mixture was stirred at room temperature for 10 days, then silica was added and the solvent removed by evaporation at reduced pressure. The resulting silica was loaded onto the top of a column of silica which was then eluted with a gradient [cyclohexane:ethyl acetate (1:1 v/v) to neat ethyl acetate to ethyl acetate:methanol (9:1 v/v)]. Concentration of the required fraction at reduced pressure furnished the title compound as a yellow glass (0.069 g).

Provenance & Evidence