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(td, J 7.5, 1.4, 1 H); 7.39( tm, J 4.4, 1 H); 7.31 (dm, J 7.5, 1 H); 3.55 (ddd, J 13.5, 5.7, 2.4, 1 H); 3.25
(ddd, J 14.4, 11.4, 3.0, 1 H); 3.16 (td, J 17.6, 4.9, 1 H); 2.95 (ddd, J 17.6, 10.8, 5.4, 1 H); 2.76 2.61 (m, 1 H);
2.28 2.17 (m, 1 H). 13C-NMR (CDCl3, 100 MHz): 167.3 (q, J 34); 137.1; 132.8; 132.7; 131.3; 128.0; 126.5; 117.1
(q, J 286); 39.2; 27.6; 15.6. 19F-NMR (CDCl3, 400 MHz): À73.4. Anal. calc. for C11H10F3NOS: C 50.57, H 3.86,
N 5.36; found: C 50.30, H 4.01, N 5.37.
S-Methyl-S-(4-methylphenyl)-N-(trichloroacetyl)sulfilimine (30). M.p. 103 1058. TLC (hexanes/AcOEt
1:2): Rf 0.42. IR (film): 1633, 1279, 978, 949, 845, 819, 796, 678. 1H-NMR (CDCl3, 300 MHz): 7.71 (dm, J 8.4,
2 H); 7.38 (d, J 8.2, 2 H); 2.94 (s, 3 H); 2.44 (s, 3 H). 13C-NMR (CDCl3, 100 MHz): 171.8; 144.1; 131.0; 130.3;
127.0; 95.2; 34.9; 21.6. Anal. calc. for C10H10Cl3NOS: C 40.22, H 3.38, N 4.69; found: C 40.32, H 3.34, N 4.70.
N-(Dichloroacetyl)-S-methyl-S-(4-methylphenyl)sulfilimine (31). M.p. 82 848. TLC (hexanes/AcOEt
1:2): Rf 0.28. IR (film): 1614, 1312, 1178, 976, 945, 802, 668. 1H-NMR (CDCl3, 300 MHz): 7.67 (dm, J 8.1,
2 H); 7.37 (d, J 8.1, 2 H); 6.06 (br. s, 1 H); 2.89( s, 3 H); 2.43 (s, 3 H). 13C-NMR (CDCl3, 100 MHz): 174.2;
143.9; 130.9; 130.6; 127.0; 68.8; 34.9; 21.6. Anal. calc. for C 10H11Cl2NOS: C 45.47, H 4.20, N 5.30; found: C 45.32,
H 3.93, N 5.23.
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