Phosgene → N-hexyl-N-methylcarbamoyl chloride

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To a solution of 0.35 ml of (i-Pr)2NEt in 10 ml of diethyl ether at 0° C. was added phosgene (1.06 ml, 1.93 M solution in toluene) and N-hexylmethylamine (0.31 ml, 2.05 mm). The reaction mixture was allowed to warm up to 25° C., and further stirred at 25° C. for 14 h. The mixture was filtered, and the solvent was removed under vacuum. The product was used for the next step reaction without further purification. 1H NMR (CDCl3): δ 3.42 (m, 2H),.3.07 (s, 3H), 1.59 (m, 2H), 1.31 (m, 6H), 0.90 (m, 3H).

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