Reaction Steps
To a solution of the above tert-butyl 1-((2S,4S)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydronaphthalen-2-yl)ethylcarbamate 50b (50 mg, 0.12 mmol) in CH2Cl2 (3 mL) was added TFA (2 mL). The reaction mixture was stirred for 1 h before being concentrated. The residue was subjected to reverse phase column chromatography (CH3CN/H2O/0.1% formic acid=5% to 100%) to give 51 (34 mg, 90%). 1HNMR (400 MHz, CDCl3) δ 7.36 (d, J=8.0 Hz, 1 H), 7.26 (d, J=2.0 Hz, 1 H), 7.12 (m, 2 H), 7.03 (m, 1 H), 7.00 (dd, J=1.6, 8.0 Hz, 1 H), 6.71 (d, J=8.0 Hz, 1 H), 4.04 (dd, J=5.2, 12.0 Hz, 1 H), 2.92 (m, 2 H), 2.72 (dd, J=12.4, 16.0 Hz, 1 H), 2.22 (m, 2 H), 1.85 (m, 1 H), 1.48 (q, J=12.0 Hz, 1H), 1.20 (d, J=6.0 Hz, 3 H); 13CNMR (100 MHz, CDCl3) δ 147.45, 138.65, 136.88, 132.65, 130.87, 130.69, 130.46, 129.54, 129.43, 128.43, 126.02, 126.26, 77.45, 51.35, 40.70, 41.77, 37.10, 32.94, 20.25; ESI MS m/z 320.0.
