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4.91–4.95 (t, 2H), 3.93–3.97 (s, 3H), 3.78–3.80 (d, 1H), 3.86–3.70 (d, 1H), 2.91–
2.94 (m, 3H), 2.54 (s, 3H), 2.22 (s, 3H), 1.53–1.61 (d, 4H), 1.32 (ddd, 1H), 0.90 (d,
1H) ppm. 13C NMR (100 MHz, DMSO): d = 181.87, 156.88, 147.46, 146.05,
144.08, 142.88, 141.91, 141.33, 131.11, 127.98, 127.84, 126.94, 126.81, 126.79,
126.49, 121.11, 114.17, 103.02, 67.24, 64.60, 59.47, 58.94, 57.18, 55.59, 55.17,
40.76, 27.36, 27.07, 25.47 ppm. IR (CH2Cl2): 3246, 3061, 3030, 2866, 1663,
1622, 1589, 1545, 1473, 1454, 1433, 1362, 1263, 1229, 1062, 1029, 920, 854,
829, 735, 702 cmÀ1.HRMS (m/z, ESI+) (free base) calcd for C29H34N4O2S
(M+H)+503.2475, found 503.2484. Spectrum data of 2c: 1H NMR
(CDCl3,400 MHz): d = 8.75 (d, 1H), 8.03 (dd, 2H), 7.80 (s, 1H), 7.38 (s, 1H),
7.13 (dd, 2H), 6.89 (s, 2H), 6.38 (s, 1H), 5.73 (dd, 2H), 5.03 (dd, 2H), 4.63 (s, 1H),
4.00 (s, 5H), 3.78 (s, 1H), 3.41(d, 1H), 3.06 (d, 1H), 2.85 (d, 2H), 2.71 (d, 2H),
2.29 (s,1H), 1.68 (s, 3H),1.44 (s, 1H),1.25 (s, 1H),0.78 (s, 1H) ppm. 13C NMR
(100 MHz, MeOD): d = 184.46, 159.84, 148.35, 145.28, 142.25, 142.06, 141.80,
131.17, 130.15, 128.81, 127.67 (2C), 126.17 (2C), 124.87, 124.12, 115.35,
104.41, 73.90, 64.18, 61.70, 56.86, 56.73, 43.39, 49.02, 40.47, 39.80, 28.66,
28.13, 27.22 ppm. HRMS (m/z ÀES) (free base) calcd for C30H34N4O2S (M+H)+
515.2475, found 515.2485.
11. Compounds 2b and 2c have been tested in other asymmetric transformations.
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7.66 (s, 1H), 7.33–7.38 (m, 5H), 7.15 (s, 2H), 5.60-5.63 (q, 1H), 5.16 (s, 1H),