General procedure for preparation target nucleosides
A mixture of guanylurea or guanylthiourea, orthoesters and dimethylformamide was refluxed for 90 min and allowed to stand at room temperature, the precipitate were recrystallized from the solution, then filtered off to give 4-amino-6-alkyl/aryl-1,3,5-triazin-2(1
H)-ones
4a-f. The structures were identified by MS [
10,
11,
12]. Then a mixture of
4, HMDS and (NH
4)
2SO
4 or pyrimidine as catalyst was refluxed for 12-16 h. After evaporation under vacuum, the silylated bases
5a-f were obtained [
13,
14]. The crude product was used in glycosylation without further purification. Silylated base (1 equiv) was dissolved in anhydrous acetonitrile, to this solution were added 1-
O-acetyl-2,3,5-tri-
O-benzoyl-β-
d-ribose (1 equiv.) or acetylated pyranosyl sugar (1 equiv.) and SnCl
4 (2 equiv.) or TMSOTf (2 equiv.) [
15] in acetonitrile. The mixture was left standing at room temperature under stirring for 10-18 h, then diluted in chloroform and neutralized with a saturated solution of sodium bicarbonate. The organic layer was separated, dried and evaporated. The residue was purified by flash column chromatography (CHCl
3-CH
3OH). Acetylated nucleosides
6-8 were obtained as white solids which were identified by
1H-NMR and MS spectra. Then the acetylated nucleosides and saturated NH
3-CH
3OH solution were stirred at room temperature for 5 h and evaporated to dryness. The residue was purified by flash column chromatography (CHCl
3-CH
3OH), and recrystallized from water/methanol to give target nucleosides
1-
3 as whte crystals.
4-Amino-1-β-d-glucopyranosyl-1,3,5-triazin-2(1H)-one (
1a). Yield: 21.6%; mp: 258-260°C (dec.) [
20] (water/methanol); IR ν/cm
-1: 3350.5, 1645.0, 1383.6, 1074.1, 902.4, 849.9, 796.5;
1H-NMR δ/ppm:3.18-3.19 (2H, m, H-6’, H-6”), 3.21-3.27 (2H, m, H-4’, H-5’), 3.56-3.57 (1H, m, H-3’),3.67-3.71 (1H, m, H-2’), 4.58 (1H, s, OH), 5.12 (1H, s, OH), 5.26 (1H, s, OH), 5.34 (1H, d,
J = 9.4 Hz, H-1’), 5.38 (1H, s, OH), 7.59 (2H, s, NH
2), 8.37 (1H, s, H-6). ESI-MS: 275.4[M+H]
+; Anal. Calcd. for C
9H
14N
4O
6: C 39.42, H 5.15, N 20.43. Found: C 39.38, H 5.12, N 20.45.
4-Amino-1-β-d-xylopyranosyl-1,3,5-triazin-2(1H)-one (1b). Yield: 21.6%; mp: 191-193°C (water/ methanol); IR ν/cm-1: 3352.8, 1640.8, 1481.6, 1383.0, 1173.7, 1094.2, 1056.2, 897.9, 864.2, 797.8; 1H-NMR δ/ppm: 3.17-3.21 (3H, m, H-4’, H-5’, H-5”), 3.62-3.63 (1H, m, H-3’), 3.78-3.79 (1H, m, H-2’), 5.13 (1H, m, OH), 5.25-5.29 (2H, m, OH), 5.39 (1H, d, J = 4.2 Hz, H-1’), 7.61 (2H, s, NH2), 8.38 (1H, s, H-6). ESI-MS: 245.1 [M+H]+; Anal. Calcd. for C8H12N4O5: C 39.35, H 4.95, N 22.94. Found: C 39.42, H 4.90, N 22.98.
4-Amino-1-α-d-mannopyranosyl-1,3,5-triazin-2(1H)-one (1c). Yield: 16.8%; mp: 158-160°C (water/ methanol); IR ν/cm-1: 3396.0, 1695.1, 1383.4, 1098.7, 1051.4, 979.9; 1H-NMR δ/ppm: 3.60-3.64 (3H, m, H-4’, H-6’, H-6”), 3.79 (1H, s, H-5’), 3.87 (1H, s, H-3’), 4.11(1H, s, H-2’), 4.56 (1H, s, OH), 5.12-5.24 (3H, m, OH), 5.74-5.77 (1H, d, J = 9.0 Hz, H-1’), 7.55 (2H, s, NH2), 8.34 (1H, s, H-6); ESI-MS: 273.3 [M-H]+; Anal. Calcd. for C9H14N4O6: C 39.42, H 5.15, N 20.43. Found: C 39.44, H 5.08, N 20.39.
4-Amino-1-(6'-deoxy-α-l-mannopyranosyl)-1,3,5-triazin-2(1H)-one (1d). Yield: 12.4 %; mp: 126-128°C (water/methanol); IR ν/cm-1: 3391.4, 2922.3, 1639.8, 1511.5, 1383.5, 1054.1, 932.3, 798.4; 1H-NMR δ/ppm: 1.32-1.37 (3H, d, J = 6.9 Hz, CH3), 3.87 (2H, s, H-4’, H-3’), 3.95-3.98 (1H, d, J = 6.9 Hz, H-5’), 4.07 (1H, s, H-2’), 5.10-5.12 (1H, d, OH), 5.19 (2H, s, OH), 5.80-5.83 (1H, d, J = 9.6 Hz, H-1’), 7.50-7.53 (2H, d, NH2), 8.32 (1H, s, H-6); ESI-MS: 259.2 [M+H]+; Anal. Calcd. For C9H14N4O5: C 41.86, H 5.46, N 21.70. Found: C 41.92, H 5.49, N 21.76.
4-Amino-1-(4'-O-α-d-glucopyranosyl-β-d-glucopyranosyl)-1,3,5-triazin-2(1H)-one (1e). Yield: 19.6%; mp: 127-129 °C (water/methanol); IR ν/cm-1: 3369.2, 1697.4, 1382.4, 1169.6, 1088.4, 1038.6, 893.1, 780.2; 1H-NMR δ/ppm: 3.08-3.09 (1H, m), 3.25-3.26 (1H, m), 3.39-3.51 (5H, m), 3.54-3.59 (2H, m), 3.61-3.67 (2H, m), 3.70-3.72 (1H, m), 4.53-4.56 (2H, m, OH), 4.94 (2H, s, OH), 5.03-5.04 (1H, d, J = 3.4 Hz, H-1”), 5.39-5.41 (1H, d, J = 9.4 Hz, H-1’), 5.43-5.44 (1H, d, OH), 5.52 (1H, s, OH), 5.71 (1H, s, OH), 7.58-7.60 (2H, d, NH2), 8.39 (1H, s, H-6); ESI-MS: 437.4 [M+H]+; Anal. Calcd. for C15H24N4O11: C 41.29, H 5.54, N 12.84. Found C 41.36, H 5.58, N 12.80.
4-Amino-1-(4'-O-β-d-galactopyranosyl-β-d-glucopyranosyl)-1,3,5-triazin-2(1H)-one (1f). Yield: 20.8%; mp: 181-182 °C (water/methanol); IR ν/cm-1: 3385.3, 1689.5, 1085.2, 896.3, 782.6; 1H-NMR δ/ppm: 3.35-3.60 (7H, m), 3.63-3.72 (3H, m), 3.75-3.76 (2H, m), 4.22 (1H, s, OH), 4.56-4.60 (2H, d, OH), 4.69 (1H, s, OH), 4.82 (2H, s, H-1”, OH), 5.15(1H, s, OH), 5.41-5.44 (2H, d, J = 9.2 Hz, H-1’), 5.46 (1H, s, OH), 7.59 (2H, s, NH2), 8.38(1H, s, H-6); ESI-MS: 437.3 [M+H]+; Anal. Calcd. For C15H24N4O11: C 41.29, H 5.54, N 12.84. Found: C 41.32, H 5.62, N 12.86.
4-Amino-6-methyl-1-β-d-ribofuranosyl-1,3,5-triazin-2(1H)-one (
1g). Yield: 23.5%; mp: 142-145 °C [
13] (water/methanol); IR ν/cm
-1: 3359.6, 1650.8, 1594.7, 1105.4, 895.1, 797.8;
1H-NMR δ/ppm: 2.43 (3H, s, CH
3), 3.45-3.47 (2H, m, H-5’, H-5”), 3.59-3.63 (1H, m, H-4’), 3.75-3.76 (1H, d, H-3’), 4.56 (1H, s, H-2’), 4.75 (1H, s, OH), 4.97 (1H, s, OH), 5.20 (1H, s, OH), 5.59-5.61 (1H, d, H-1’), 7.46-7.47 (2H, s, NH
2); ESI-MS: 259.2 [M+H]
+; Anal. Calcd. for C
9H
14N
4O
5: C 41.86, H 5.46, N 21.70. Found C 41.89, H 5.43, N 21.75.
4-Amino-β-d-glucopyranosyl-6-methyl-1,3,5-triazin-2(1H)-one (1h). Yield: 16.8%; mp: 168-169 °C (water/methanol); IR ν/cm-1: 3373.2, 2926.8, 1636.9, 1526.2, 1383.8, 1190.4, 1077.8, 893.3, 797.7; 1H-NMR δ/ppm: 2.44( 3H, m, CH3), 3.22-3.25 (2H, m, H-6’, H-6”), 3.45-3.47 (2H, m, H-4’, H-5’), 3.67-3.71 (2H, d, H-3’), 4.21-4.52 (5H, br, OH, H-2’), 5.26-5.27 (1H, d, J = 5.2 Hz, H-1’); 7.32 (2H, s, NH2); ESI-MS: 287.4 [M-H]-; Anal. Calcd. for C10H16N4O6: C 41.67, H 5.59, N 19.44. Found C 41.56, H 5.64, N 19.49.
4-Amino-6-methyl-1-β-d-xylopyranosyl-1,3,5-triazin-2(1H)-one (1i). Yyield 19.7%; mp: 156-158 °C (water/methanol); IR ν/cm-1: 3406.9, 2923.4, 1669.1, 1301.2, 1048.0, 978.0, 943.5, 896.2; 1H-NMR δ/ppm: 2.41 (3H, s, CH3), 3.16-3.20 (4H, m, H-3’, H-4’, H-5’, H-5”), 3.81-3.82 (1H, m,H-2’), 5.08-5.13 (4H, m, br, OH), 5.35-5.36 (1H, d, J = 8.5 Hz, H-1’), 7.30 (2H, s, NH2); ESI-MS: 257.3 [M-H]+; Anal. Calcd. for C9H14N4O5: C 41.86, H 5.46, N 21.70. Found C 41.80, H5.38, N 21.72.
4-Amino-1-α-d-mannopyranosyl-6-methyl-1,3,5-triazin-2(1H)-one (1j). Yield: 14.7 %; mp: 173-175 °C (water/methanol); IR ν/cm-1: 3383.8, 2926.3, 1633.7, 1529.3, 1384.2, 1113.7, 1055.0, 922.2, 865.0, 797.9; 1H-NMR δ/ppm: 2.47 (3H, s, CH3), 3.56 (1H, m, H-6”), 3.63-3.70 (2H, m, H-4’, H-5’), 3.84-3.85 (1H, m, H-3’), 3.91-3.94 (1H, m, H-6’), 4.52-4.56 (2H, m, OH, H-2’), 4.95-4.97 (1H, d, OH), 5.04-5.08 (2H, OH), 5.93-5.96 (1H, d, J = 8.9 Hz, H-1’), 7.25 (2H, s, NH2); ESI-MS: 287.2 [M-H]-; Anal. Calcd. for C10H16N4O6: C 41.67, H 5.59, N 19.44. Found C 41.58, H 5.54, N 19.35.
6-Amino-1-β-d-glucopyranosyl-4-methyl-1,3,5-triazin-2(1H)-one (2a). Yield: 10.6%; mp: 181-182 °C (water/methanol); IR ν/cm-1: 3394.1, 1688.5, 1564.4, 1069.4, 899.9, 795.4; 1H-NMR δ/ppm: 2.06 (3H,s,CH3), 3.23-3.36 (2H, m, H-6’, H-6”), 3.49-3.62 (3H, m, H-3’, H-4’, H-5’), 3.73 (1H, s, H-2’), 4.73-4.77 (1H, t, OH), 5.16-5.18 (1H, d, OH), 5.25-5.26 (1H, d, OH), 5.40-5.42 (1H, d, OH), 5.80 (1H, s, H-1’), 6.94 (1H, s, NH), 8.35 (1H, s, NH); ESI-MS: 287.3 [M-H]+; Anal. Calcd. for C10H16N4O6: C 41.67, H 5.59, N 19.44. Found C 41.58, H 5.57, N 19.38.
6-Amino-4-methyl-1-β-d-xylopyranosyl-1,3,5-triazin-2(1H)-one (2b). Yield: 12.1%; mp: 170-172 °C (water/methanol); IR ν/cm-1: 3378.7, 1692.2, 1565.2, 1384.1, 1091.9, 1038.3, 895.4, 846.6, 797.5; 1H-NMR δ/ppm: 2.08 (3H, s, CH3), 3.18 (2H, s, H-5’, H-5”), 3.66-3.83 (3H, m, H-2’, H-3’, H-4’), 5.04-5.06 (1H, d, OH), 5.19(1H, s, OH), 5.36-5.38 (1H, d, OH), 5.75(1H, s, br, H-1’), 7.04 (1H, s, br, NH), 8.31 (1H, s, br, NH); ESI-MS: 258.7 [M+H]+; Anal. Calcd. for C9H14N4O5: C 41.86, H 5.46, N 21.70. Found C 41.80, H 5.40, N 21.63.
6-Amino-1-α-d-mannopyranosyl-4-methyl-1,3,5-triazin-2(1H)-one (2c). Yield: 8.9%; mp: 162-164 °C (water/methanol); IR ν/cm-1: 3400.5, 1687.0, 1558.7, 1481.7, 1384.6, 1050.0, 1012.3, 921.4, 866.8, 796.4; 1H-NMR δ/ppm: 2.09 (3H, s, CH3), 3.54-3.57 (1H, m, H-6”), 3.73 (1H, s, H-3’), 3.89 (3H, s, H-4’, H-5’, H-6’), 4.28-4.30 (1H, m, H-2’), 4.73 (1H, s, OH), 5.05-5.07 (1H, d, OH), 5.21-5.22 (1H, d, OH), 5.51 (1H, s, OH), 6.27-6.30 (1H, d, J = 9.7 Hz, H-1’), 6.98 (1H, s, br, NH), 8.46 (1H, s, br, NH); ESI-MS: 287 [M-H]+; Anal. Calcd. for C10H16N4O6: C 41.67, H 5.59, N 19.44. Found C 41.56, H 5.64, N 19.49.
6-Amino-1-(4'-O-α-d-glucopyranosyl-β-d-glucopyranosyl)-4-methyl-1,3,5-triazin-2(1H)-one (2d). Yield: 14.6%; mp: 175-177 °C (water/methanol); IR ν/cm-1: 3418.6, 2923.2, 1692.2, 1379.9, 1059.2, 918.6, 893.2, 869.0, 840.9, 798.3; 1H-NMR δ/ppm: 2.11 (3H, s, CH3), 3.10-3.12 (1H, m), 3.28 (2H, s), 3.60-3.83 (8H, m), 4.47 (1H, s, OH), 4.56 (1H, s, OH), 4.78 (1H, s, OH), 4.97 (2H, s, OH, H-2’), 5.02-5.03 (1H, s, H-1”), 5.54 (1H, s, OH), 5.58-5.60 (1H, d, OH), 5.74 (1H, s, OH), 5.89 (1H, s, H-1’), 7.02 (1H, s, br, NH), 8.40 (1H, s, br, NH); ESI-MS: 449.4 [M-H]+; Anal. Calcd. for C16H26N4O11: C 42.67, H 5.82, N 12.44. Found C 42.55, H 5.93, N 12.49.
6-Amino-4-ethyl-1-β-d-ribofuranosyl-1,3,5-triazin-2(1H)-one (2e). Yield: 10.3%; mp: 180-182 °C (water/methanol); IR ν/cm-1: 3314.9, 1682.0, 1655.5, 1552.7, 1115.2, 1085.0, 900.3, 876.1, 854.0, 806.1; 1H-NMR δ/ppm: 1.11-1.16 (3H, t, J = 7.5 Hz, CH3), 2.32-2.40 (2H, q, J = 7.5 Hz, CH2), 3.57-3.67 (2H, m, H-5’, H-5”), 3.94 (1H, s, H-3’), 4.03 (1H, s, H-2’), 4.34-4.41 (1H, m, H-4’), 5.08-5.09 (1H, d, OH), 5.24-5.26 (1H, d, OH), 5.72 (1H, s, H-1’), 6.31-6.34 (1H, d, OH), 7.87(1H, s, br, NH), 8.38 (1H, s, br, NH); ESI-MS: 273.2 [M+H]+; Anal. Calcd. for C10H16N4O5: C 44.12, H 5.92, N 20.58. Found C 44.32, H 5.96, N 20.54.
6-Amino-4-phenyl-1-β-d-ribofuranosyl-1,3,5-triazin-2(1H)-one (
2f). Yield: 17.8%; mp: 200-202 °C (dec.) [
12] (water/methanol); IR ν/cm
-1: 3383.5, 1680.8, 1478.4, 1109.5, 1077.4, 902.9, 786.0;
1H-NMR δ/ppm: 3.63-3.69 (2H, m, H-5’, H-5”), 3.97 (1H, s, H-4’), 4.06 (1H, s, H-3’), 4.42-4.42-4.45 (1H, m, H-2’), 5.14-5.15 (1H, d, OH), 5.33-5.36 (1H, d, OH), 5.81 (1H, s, OH), 6.39-6.41 (1H, d, OH), 7.47-7.57 (3H, m, aromatic H ), 8.07 (1H, s, br, NH), 8.25-8.31(2H, m, aromatic H), 8.59 (1H, s, br, NH); ESI-MS: 321.1[M+H]
+; Anal. Calcd. for C
14H
16N
4O
5: C 52.50, H 5.03, N 17.49. Found C 52.48, H 5.08, N 17.52.
4-Amino-1,3,5-triazin-2-yl-1-thio-β-d-ribofuranoside (3a). Yield: 15.9%; mp: 117-118 °C (water/ methanol); IR ν/cm-1: 3278.4, 1682.1, 1569.6, 1212.3, 1066.0, 1047.9, 985.6, 935.3, 915.7, 831.7, 756.7; 1H-NMR δ/ppm: 3.40-3.45 (2H, m, H-5’, H-5”), 3.78-3.79 (1H, d, H-4’), 3.90-3.92 (1H, d, H-3’), 4.00-4.02 (1H, d, J = 4.5 Hz, H-2’), 4.78 (1H, s, OH), 5.01-5.02 (1H, d, OH), 5.38-5.40 (1H, d, OH), 5.86-5.87 (1H, d, J = 4.5 Hz, H-1’), 7.62 (2H, s, NH2), 8.24 (1H, s, H-6); ESI-MS: 261.1 [M+H]+; Anal. Calcd. for C8H12N4O4S: C 36.92, H 4.65, N 21.53. Found C 36.81, H 4.69, N 21.59.
4-Amino-1,3,5-triazin-2-yl-1-thio-β-d-glucopyranoside (3b). Yield: 10.7%; mp: 134-135 °C (water/ methanol); IR ν/cm-1: 3334.0, 2918.7, 1647.5, 1564.8, 1384.8, 1195.1, 1044.3, 942.2, 877.3, 808.4, 759.3; 1H-NMR δ/ppm: 3.16 (4H, s, H-4’, H-5’, H-6’, H-6”), 3.43-3.46(1H, m, H-2’), 3.61-3.62 (1H, m, H-3’), 4.48 (1H, s, OH), 5.00 (1H, s, OH), 5.14-5.15 (1H, d, OH), 5.34-5.38 (1H,d, J = 9.9 Hz, H-1’), 5.40-5.42 (1H, d, OH), 7.56-7.59 (2H, d, NH2), 8.25 (1H, s, H-6); ESI-MS: 291.3 [M+H]+; Anal. Calcd. for C9H14N4O5S: C 37.24, H 4.86, N 19.30. Found C 37.34, H 4.89, N 19.38.
4-Amino-1,3,5-triazin-2-yl-1-thio-β-d-xylopyranoside (3c). Yield: 14.6%; mp: 150-152 °C (water/ methanol); IR ν/cm-1: 3288.0, 1691.9, 1575.4, 1382.2, 110.7, 1068.6, 900.9, 833.4, 804.1, 757.7; 1H-NMR δ/ppm: 3.12-3.23 (4H,m, H-2’, H-3’, H-4’, H-5”), 3.77-3.83 (1H, m, H-5’), 5.06-5.08 (1H, d, OH), 5.22-5.24 (1H, d, OH), 5.38-5.41 (1H, d, J = 8.7 Hz, H-1’), 5.42-5.44 (1H, OH), 7.59 (2H, s, NH2), 8.25(1H, s, H-6); ESI-MS: 259.2 [M-H]+; Anal. Calcd. for C8H12N4O4S: C 36.92, H 4.65, N 21.53. Found C 36.98, H 4.58, N 21.50.
4-Amino-1,3,5-triazin-2-yl-1-thio-α-d-mannopyranoside (3d). Yield: 11.7%; mp: 116-118 °C (water/ methanol); IR ν/cm-1: 3401.9, 1652.3, 1564.4, 1384.1, 1105.1, 880.7, 753.7; 1H-NMR δ/ppm: 3.17-3.44 (4H, m, H-4’, H-5’, H-6’, H-6”), 3.62 (1H, s, H-3’), 3.84 (1H, s, H-2’), 4.50 (1H, s, OH), 4.89 (2H, s, OH), 5.24 (1H, s, OH), 6.30 (1H, s, H-1’), 7.66 (2H, s, NH2), 8.27 (1H, s, H-6); ESI-MS: 291.1 [M+H]+; Anal. Calcd. for C9H14N4O5S: C 37.24, H 4.86, N 19.30. Found C 37.16, H 4.85, N 19.37.
4-Amino-4’-O-α-d-glucopyranosyl-1,3,5-triazin-2-yl-1-thio-β-d-glucopyranoside (3e). Yield: 14.3%; mp: 191-193 °C (water/methanol); IR ν/cm-1: 3404.3, 2923.2, 1642.0, 1566.0, 1518.8, 1384.2, 1032.7, 810.5, 759.3; 1H-NMR δ/ppm: 3.06-3.31 (3H, m), 3.40-3.46 (6H, m), 3.59-3.62 (3H, m, H-2’, H-2”, H-3’), 4.48-4.50 (2H, m, OH), 4.88-4.93 (2H, OH), 5.03-5.04 (1H, d, J = 3.6 Hz, H-1”), 5.36-5.40 (1H, d, J = 10.5 Hz, H-1’), 5.42-5.44 (1H, d, OH), 5.51-5.53 (1H, d, OH), 5.67-5.68 (1H, d, OH), 7.55-7.61 (2H, d, NH2), 8.25 (1H, s, H-6); ESI-MS: 453.2 [M+H]+; Anal. Calcd. for C15H24N4O10S: C 39.82, H 5.35, N 12.38. Found C 39.76, H 5.28, N 12.34.
4-Amino-6-methyl-1,3,5-triazin-2-yl-1-thio-β-d-ribofuranoside (3f). Yield: 16.8%; mp: 117-118 °C (water/methanol); IR ν/cm-1: 3406.9, 3180.9, 1662.1, 1557.3, 1043.3, 801.9; 1H-NMR δ/ppm: 2.20 (3H, s, CH3), 3.39-3.41 (1H, m, H-5”), 3.45-3.46 (1H, m, H-5’), 3.78-3.79 (1H, m, H-4’), 3.89-3.91 (1H, m, H-3’), 3.98-4.01 (1H, m, H-2’), 4.76-4.78 (1H, m, OH), 5.01-5.03 (1H, d, OH), 5.38-5.40 (1H, d, OH), 5.88-5.89 (1H, d, J = 4.5 Hz, H-1’), 7.47 (2H, s, NH2); ESI-MS: 275.1 [M+H]+; Anal Calcd. for C9H14N4O4S: C 39.41, H 5.14, N 20.43. Found C 39.52, H 5.18, N 20.45.
4-Amino-6-methyl-1,3,5-triazin-2-yl-1-thio-β-d-glucopyranoside (3g). Yield: 15.9%; mp: 117-119 °C (water/methanol); IR ν/cm-1: 3340.1, 1644.8, 1545.3, 1384.3, 1283.5, 1049.1, 879.0, 820.7; 1H-NMR δ/ppm: 2.21 (3H, s, CH3), 3.12-3.17 (3H, m, H-5’, H-6’, H-6”), 3.21-3.22 (1H, m, H-4’), 3.44-3.45 (1H, m, H-2’), 3.60-3.61 (1H, m, H-3’), 4.46-4.48 (1H, t, OH), 5.00-5.01 (1H, d, OH), 5.14-5.15 (1H, d, OH), 5.37-5.38 (1H, d, J = 10.4 Hz, H-1’), 5.39-5.40 (1H, d, OH), 7.40 (1H, s, NH), 7.45 (1H, s, NH); ESI-MS: 303.3 [M-H]+; Anal. Calcd. for C10H16N4O5S: C 39.47, H 5.30, N 18.41. Found C 39.53, H 5.32, N 18.52.
4-Amino-6-methyl-1,3,5-triazin-2-yl-1-thio-β-d-xylopyranoside (3h). White crystal; yield: 13.8%; mp: 150-152 °C (water/methanol); IR ν/cm-1: 3280.5, 1684.9, 1582.4, 1379.2, 1068.6, 902.5, 836.6, 759.2; 1H-NMR δ/ppm: 2.22 (3H, s, CH3), 3.12-3.23 (3H, m, H-3’, H-4’, H-5”), 3.39 (1H, m, H-2’), 3.78-3.82 (1H, m, H-5’), 5.05-5.07 (1H, d, OH), 5.21-5.22 (1H, s, OH), 5.40-5.44 (2H, m, OH, H-1’), 7.45 (2H, d, NH2). ESI-MS: 273.4 [M-H]+; Anal. Calcd. for C9H14N4O4S: C 39.41, H 5.14, N 20.43. Found C 39.50, H 5.32, N 20.46.
4-Amino-6-methyl-1,3,5-triazin-2-yl-1-thio-α-d-mannopyranoside (3i). Yield: 12.4%; mp: 199-201 °C (water/methanol); IR ν/cm-1: 3339.3, 1654.6, 1553.5, 1281.2, 1212.6, 1071.6, 973.5, 899.8, 844.5, 804.3, 766.0; 1H-NMR δ/ppm: 2.23 (3H, s, CH3), 3.44-3.48 (4H, m, H-3’, H-4’, H-5’, H-6’), 3.61-3.65 (1H, d, H-6”), 3.83 (1H, s, H-2’), 4.49 (1H, s, OH), 4.88 (2H, s, OH), 5.21 (1H, s, OH), 6.34 (1H, s, H-1’), 7.49-7.51 (2H, d, NH2); ESI-MS: 303.4 [M-H]+; Anal. Calcd. for C10H16N4O5S: C 39.47, H 5.30, N 18.41. Found C 39.52, H 5.36, N 18.44.
4-Amino-4’-O-α-d-glucopyranosyl-6-methyl-1,3,5-triazin-2-yl-1-thio-β-d-glucopyranoside (3j). Yield: 16.8%; mp: 194-196 °C (water/methanol); IR ν/cm-1: 3384.5, 1645.0, 1556.8, 1281.5, 1074.0, 895.2, 805.0; 1H-NMR δ/ppm: 2.24 (3H, s, CH3), 3.23-3.26 (2H, m), 3.34-3.52 (2H, m), 3.54-3.55 (3H, m), 3.56-3.58 (5H, m), 3.65-3.72 (3H, m), 4.24-4.27 (1H, d, OH), 4.28-5.32 (5H, br, OH), 5.41-5.45 (1H, d, J = 10.3 Hz, H-1’), 7.44-7.49 (2H, d, NH2); ESI-MS: 465.4 [M-H]+; Anal. Calcd. for C16H26N4O10S: C 41.20, H 5.62, N 12.01. Found C 41.32, H 5.68, N 12.05.