2,4,6-Trimethylpyridine → HCID 58866206, compound

Participants

Reaction Conditions

Reaction Steps

5-(2-trimethylsilanyl-ethoxycarbonylamino)-1,3-dioxane-5-carboxylic acid from above (0.050 g, 0.17 mmol), ethyl-4-aminocinnamate (0.036 g, 0.19 mmol), HATU (0.098 g, 0.26 mmol), HOAt (0.035 g, 0.26 mmol) and 2,4,6-collidine (0.062 mL, 0.51 mmol) were combined in anhydrous DMSO (1 mL). The solution was warmed to 60° C. and stirred for 6 h before another 1.5 equivalents of HATU was added and stirring was continued for another 2 hours to ensure complete consumption of the acid. The reaction mixture was diluted with dichloromethane and washed with 1N HCl (×2). The organic phase was dried with MgSO4, filtered and concentrated. The residue was subjected to flash chromatography to afford 0.043 g (54%) of the protected amide derivative as a yellow oil.

Provenance & Evidence