Triethylamine → 1-Methyl-1H-pyrazole-4-sulfonic acid (2,2-dimethoxy-ethyl)-methyl-amide

Participants

Reaction Steps

Cool a solution of methylaminoacetaldehyde dimethyl acetal (22.5 mL, 0.18 mol) and triethylamine (26.5 mL, 0.19 mol) to 0° C. in CH2Cl2, then add dropwise a solution of 1-methyl-1H-pyrazole-4-sulfonyl chloride (30 g, 0.17 mol). Stir the reaction mixture at room temperature overnight, dilute with CH2Cl2 (500 mL), and wash with water. Dry the combined organics over Na2SO4, filter and concentrate. The resulting oil is placed under high vacuum and within two hours a resulting off white solid is formed, which is used without further purification (38.22 g, 87%).

Provenance & Evidence