2-Thiophenecarboxaldehyde, 5-chloro- → {4-[(5-Chloro-thiophen-2-ylmethyl)-amino]-2,6-dimethyl-phenyl}-carbamic acid propyl ester

Participants

Reaction Conditions

Reaction Steps

(4-Amino-2,6-dimethyl-phenyl)-carbamic acid propyl ester (84 mg) and 5-chloro-thiophene-2-carbaldehyde (48 uL) were dissolved in methanol (3 mL) and heated to 130° C. for 5 minutes in a sealed microwave process vial. Sodium cyanoborohydride (95 mg) was added and the reaction mixture was heated to 130° C. for 5 minutes in a sealed microwave process vial, followed by addition of water/brine (1:1, 3 mL). The product was extracted with ethyl acetate (3×3 mL) and the combined organic phases were washed with brine (5 mL), dried over magnesium sulfate and concentrated in vacuo. The crude product was purified by flash chromatography to furnish 66 mg (49% yield) of the title compound as an oil. LC-MS (m/z) 353 (MH+); tR=3.06, (UV, ELSD) 87%, 87%.

Provenance & Evidence