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42949117026
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TFE (pKa ca. 12.4, nucleophilicity ca. -2.8); HFIP (pKa ca. 9.3, nucleophilicity ca. -4.2).
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TFE (pKa ca. 12.4, nucleophilicity ca. -2.8); HFIP (pKa ca. 9.3, nucleophilicity ca. -4.2).
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58
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42949147103
-
-
Reaction effected with HFIP as solvent is easier to purify by chromatography than with TFE as solvent
-
Reaction effected with HFIP as solvent is easier to purify by chromatography than with TFE as solvent.
-
-
-
-
59
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42949149801
-
-
NMR Data (Table 1) Entry 1: 1H NMR (300 MHz, CDCl3, δ, 7.31 (d, 1 H, J, 1.7 Hz, 7.27 (dd, 1 H, J, 8.2, 1.7 Hz, 6.76 (d, 1 H, J, 8.2 Hz, 4.92 (m, 1 H, 3.29 (dd, 1 H, J, 15.4, 8.2 Hz, 2.81 (dd, 1 H, J, 15.4, 8.2 Hz, 1.34 (dd, 1 H, J, 14.3, 6.6 Hz, 1.11 (dd, 1 H, J, 14.3, 8.8 Hz, 0.24 (s, 9 H, 0.11 (s, 9 H, 13C NMR (75 MHz, CDCl 3, δ, 156.8, 130.8, 128.7, 128.6, 126.4, 122.5, 122.5, 118.5, 112.1, 82.9, 36.9, 25.6, 0.7. Entry 2: 1H NMR (300 MHz, CDCl3, δ= 7.32 (d, 1 H, J, 1.7 Hz, 7.08 (dd, 1 H, J, 8.2, 1.7 Hz, 6.66 (d, 1 H, J, 8.2 Hz, 4.90 (m, 1 H, 3.26 (dd, 1 H, J, 15.4, 8.2 Hz, 2.82 (dd, 1 H, J, 15.4, 8.2 Hz, 1.26 (m, s, 4 H, 1.05 (dd, 1 H, J, 14.3, 8.8 Hz, 0.09 (s, 9 H, 13C NMR 75 MHz, CDCl3, δ, 158.0, 129.4, 127.6, 124.8, 11
-
3): δ = 158.8, 155.7, 149.6, 129.4, 128.7, 122.0, 119.3, 117.3, 117.0, 109.3, 82.7, 38.4, 25.2, -0.8.
-
-
-
-
60
-
-
42949157378
-
-
NMR Data Compound 13: 1H NMR (300 MHz, CDCl 3, δ, 7.76 (d, 1 H, J, 8.2 Hz, 7.63 (d, 1 H, J, 8.2 Hz, 7.54 (d, 1 H, J, 8.2 Hz, 7.43 (t, 1 H, J, 8.2 Hz, 7.27 (d, 1 H, J, 8.2 Hz, 7.05 (d, 1 H, J, 8.2 Hz, 5.10 (m, 1 H, 3.56 (dd, 1 H, J, 14.8, 8.8 Hz, 3.03 (dd, 1 H, J, 14.8, 8.2 Hz, 1.37 (dd, 1 H, J, 13.7, 6.6 Hz, 1.18 (dd, 1 H, J, 14.3, 8.8 Hz, 0.11 (s, 9 H, 13C NMR (75 MHz, CDCl 3, δ, 156.8, 130.8, 128.9, 128.7, 128.6, 126.4, 122.5, 122.5, 118.5, 112.1, 82.9, 36.9, 25.6, 0.7. Compound 15: 1H NMR (300 MHz, CDCl3, δ, 6.35 (s, 2 H, 4.92 (m, 1 H, 3.84 (s, 3 H, 3.77 (s, 3 H, 3.22 (dd, 1 H, J, 15.4, 8.2 Hz, 2.79 (dd, 1 H, J, 15.4, 8.2 Hz, 1.42 (dd, 1 H, J, 14.3, 6.6 Hz, 1.19 (dd, 1 H, J, 14.3, 8.8 Hz, 0.10 (s, 9 H, 13C NMR 75 MHz, CDCl3
-
3): δ = 154.4, 144.3, 141.9, 128.3, 101.4, 99.1, 82.9, 56.0, 38.9, 30.9, 25.0, -0.9.
-
-
-
-
61
-
-
42949089979
-
-
3): δ = 154.4, 144.3, 141.8, 138.2, 133.5, 129.1, 128.2, 127.8, 101.3, 99.1, 82.6, 55.9, 38.7, 24.3, -2.2, -2.4.
-
3): δ = 154.4, 144.3, 141.8, 138.2, 133.5, 129.1, 128.2, 127.8, 101.3, 99.1, 82.6, 55.9, 38.7, 24.3, -2.2, -2.4.
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-
-
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