Diethyl Ether → N-(4-aminocyclohexyl)methanesulfonamide

関与物質

反応手順

1,1-Dimethylethyl {4-[(methylsulfonyl)amino]cyclohexyl}carbamate (0.922 g, 3.15 mmol) was dissolved in DCM (50 mL). TFA was added (2.429 mL, 31.5 mmol) and the reaction allowed to stir at rt for 1 h. Evaporated off the volatiles and added DCM (50 mL) followed by evaporation of volatiles. The DCM addition/evaporation was repeated several times to give a maroon semi-solid. The residual semi-solid was treated with diethyl ether (10 mL) after which the suspension was sonicated and triturated, then filtered. Solids were triturated with more diethyl ether (10 mL). The product was suction dried to give title compound of Step B as a light pink solid (0.938 g). 1H NMR (400 MHz, DMSO-d6) δ ppm 7.80 (br. s., 2H), 7.07 (d, J=7.2 Hz, 1H), 3.33 (s, 2H), 3.01-3.14 (m, 1H), 2.78-3.01 (m, 2H), 1.80-2.02 (m, 4H), 1.17-1.47 (m, 4H).

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