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[16] Spectral data of new compounds: [3c] (X = Cl, entry 7 in Table 2): 1H NMR (600 MHz, CDCl3): d 1.08 (d, 3H, J = 6.6 Hz), 1.52 (s, 3H), 1.53 (s,
3H), 2.43 (s, 3H), 3.35 (m, 1H), 4.62 (d, 1H, J = 9.0 Hz), 7.31 (d, 2H, J = 7.8 Hz), 7.76 (d, 2H, J = 7.8 Hz). Anal. Calcd. for C12H18ClNO2S: C
52.26, H 6.58, N 5.08. Found: C 52.23, H 6.55, N 5.07. 2c/3c (X = Br, entry 8 in Table 2): 1H NMR (600 MHz, CDCl3): d 1.10 (d, 3H,
J = 6.6 Hz, 3c), 1.29 (s, 3H, 2c), 1.32 (s, 3H, 2c), 1.66 (d, 3H, J = 6.6 Hz, 2c), 1.69 (s, 3H, 3d), 1.69 (s, 3H, 3c), 1.72 (s, 3H, 3c), 2.43 (s, 3H, 3c),
2.43 (s, 3H, 2c), 3.10 (m, 1H, 3c), 4.28 (m, 1H, 2c), 4.60 (d, 1H, J = 8.4 Hz, 3c), 4.92 (brs, 1H, 2c), 7.30 (d, 2H, J = 8.4 Hz, 2c), 7.31 (d, 2H,
J = 8.4 Hz, 3c), 7.76 (d, 2H, J = 8.4 Hz, 3c), 7.78 (d, 2H, J = 8.4 Hz, 3c); EI-MS m/z 319(M+, 1), 240(4), 198(100), 155(96), 91(95). Anal.
1
Calcd. for C12H18BrNO2S: C 45.01, H 5.67, N 4.37. Found: C 45.03, H 5.70, N 4.35. 3c (X = I, entry 9 in Table 2): H NMR (600 MHz,
CDCl3): d 1.10 (d, 3H, J = 6.6 Hz), 1.85 (s, 3H), 1.92 (s, 3H), 2.25 (m, 1H), 2.43 (s, 3H), 4.60 (d, 1H, J = 9.6 Hz), 7.31 (d, 2H, J = 7.8 Hz), 7.76
(d, 2H, J = 7.8 Hz). Anal. Calcd. for C12H18INO2S: C 39.25, H 4.94, N 3.81. Found: C 39. 26, H 4.96, N 3.83. 2e (X = Cl, entry 13 in Table 2):
1H NMR (600 MHz, CDCl3): d 0.88 (t, 3H, J = 6.6 Hz), 1.03–1.34 (m, 28H), 1.40–1.56 (m, 2H), 2.43 (s, 3H), 3.42–3.54 (m, 3H), 4.70 (d, 1H,
J = 7.8 Hz), 7.31 (t, 2H, J = 7.8 Hz), 7.77 (d, 2H, J = 7.8 Hz). EI-MS m/z 457 (M+, 1), 408 (58), 232 (37), 155 (100), 91 (88). Anal. Calcd. for
C25H44ClNO2S: C 65.54, H 9.68, N 3.06. Found: C 65.57; H, 9.69, N 3.07. 2e (X = Br, entry 14 in Table 2): 1H NMR (600 MHz, CDCl3): d 0.88
(t, 3H, J = 6.6 Hz), 1.03–1.32 (m, 28H), 1.41–1.56 (m, 2H), 2.43 (s, 3H), 3.30–3.36 (m, 1H), 3.37–3.43 (m, 2H), 4.69 (d, 1H, J = 8.4 Hz), 7.31
(t, 2H, J = 7.8 Hz), 7.77 (d, 2H, J = 7.8 Hz). Anal. Calcd. for C25H44BrNO2S: C 59.74, H 8.82, N 2.79. Found: C 59.77, H 8.83, N 2.79. 2e
(X = I, entry 15 in Table 2): 1H NMR (600 MHz, CDCl3): d 0.88 (t, 3H, J = 7.2 Hz), 1.00–1.34 (m, 28H), 1.35–1.48 (m, 2H), 2.43 (s, 3H), 2.93
(m, 1H), 3.14–3.25 (m, 2H), 4.61 (d, 1H, J = 8.4 Hz), 7.31 (t, 2H, J = 7.8 Hz), 7.77 (d, 2H, J = 7.8 Hz). Anal. Calcd. for C25H44INO2S: C 54.63,
H 8.07, N 2.55. Found: C 54.61, H 8.05, N 2.54. 4: 1H NMR (600 MHz, CDCl3): d 1.17 (d, 3H, J = 7.2 Hz), 1.56 (s, 3H), 2.42 (s, 3H), 3.84 (m,
1H), 4.44 (d, 1H, J = 7.2 Hz), 4.72 (s, 1H), 4.80 (s, 1H), 7.28 (d, 2H, J = 9.0 Hz), 7.74 (d, 2H, J = 8.4 Hz); EI-MS m/z 239 (M+, 1), 155 (8.1), 91
(21), 84 (100). Anal. Calcd. for C12H17NO2S: C 60.22, H 7.16, N 5.85. Found: C 60.23, H 7.19, N 5.86.