Ethanol → trans-(7-Carbamoyl-1,1-diethyl-3-methoxy-1,2,3,4-tetrahydronaphthalen-2-yl)-carbamic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

To a mixture of trans-(7-cyano-1,1-diethyl-3-methoxy-1,2,3,4-tetrahydro-naphthalen-2-yl)-carbamic acid tert-butyl ester (33.0 g, 92 mmol), ethanol (45 mL), DMF (25 mL) and water (7.5 mL) was added hydrido(dimethylphosphoniousacid-kP) [hydrogen bis(dimethylphosphinito-kP)]platinum(II) (0.25 g, 0.58 mmol) and the reaction mixture was heated at 80° C. for 24 h. The reaction was cooled to room temperature and concentrated to dryness under vacuum to give the title compound (36.3 g) which was used without further purification. (m/z): [M+H]+ calcd for C21H32N2O4 377.24; found 377.8. 1H NMR (d6-DMSO, 400 mHz) δ (ppm): 7.92 (s, 1H), 7.64 (m, 2H), 7.26 (s, 1H), 7.14 (d, J=7.9 Hz, 1H), 6.64 (d, J=9.4 Hz) 3.81 (t, J=10.0 Hz), 3.58 (m, 1H), 3.30 (s, 3H), 2.58 (dd, J=16.9 Hz, 9.4 Hz, 1H), 1.82 (m, 1H), 1.56-1.45 (m, 4H), 1.41 (s, 9H), 0.58 (m, 6H).

Provenance & Evidence