Triethylamine → HCID 178440693, compound

Participants

Reaction Steps

A solution of 4-tert-butyl-1,2-diaminobenzene (1 g, 6 mmol), N-boc-3-hydroxy-L-valine (1.4 g, 6 mmol) and triethylamine (1.5 mL, 15.1 mmol) in dioxane (50 mL) was stirred at 0° C. for 15 minutes. T3P (50% w/w in EtOAc, 4.6 mL, 7.3 mmol) was added dropwise and the reaction continued stirring at this temperature for 30 minutes. The reaction was then heated to reflux for 5 hours before cooling and diluting with EtOAc. The solution was washed with saturated aqueous sodium carbonate solution twice, dried over Na2SO4 and concentrated in vacuo. The residue was purified using silica gel column chromatography eluting with 0-50% EtOAc in heptanes. The residue was dissolved in dioxane (10 mL) at 0° C. and treated with 4M HCl in dioxane (10 mL). The reaction was stirred at room temperature for 2 hours before concentrating in vacuo. The residue was washed with EtOAc and pentane before basifying with saturated aqueous NaOH solution and extracting into EtOAc. The organic layer was collected, dried over Na2SO4, concentrated in vacuo and triturated with 10% EtOH in pentane (5 mL) to afford the title compound (25 mg, 2%).

Provenance & Evidence