Triethylamine → Methyl 2-({[4-(2,3-butadienyloxy)phenyl]sulfonyl}amino)-3-methylbutanoate

Participants

Reaction Steps

To a solution of DL-valine methyl ester hydrochloride (527 mg, 3.15 mmol) was added triethylamine (579 mg, 5.72 mmol) followed by product from Example 5 (700 mg, 2.86 mmol) and the resulting mixture was stirred for 10 hours at room temperature. The solvent was removed in vacuo and the residue was partitioned between water and ethyl acetate. The organic layer was washed with 1N hydrochloric acid, saturated sodium bicarbonate, saturated sodium chloride and dried over anhydrous sodium sulfate. Removal of the solvent in vacuo gave 850 mg (87%) of the product as a solid.

Provenance & Evidence