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84899778889
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note
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α-OMe and C=O groups, respectively. See ref 2c
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-
-
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14
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84899779828
-
-
note
-
RS = δR - δS).
-
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15
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0030221013
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0030586223
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(b) Tyrrell, E.; Tsang, M. W. H.; Skinner, G. A.; Fawcett, J. Tetrahedron 1996, 52, 9841-9852.
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0030200525
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0030954724
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24
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0000051486
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25
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0842341771
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33
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0001683823
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36
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49249150528
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Ring current theories in NMR
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Pergamon Press: Elmsford, NY
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(f) Haigh, C. W.; Mallion, R. B. Ring current theories in NMR. In Progress in NMR spectroscopy; Pergamon Press: Elmsford, NY, 1980; pp 303-344.
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0030985551
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Ferreiro, M. J.; Latypov, Sh. K.; Quiñoá, E.; Riguera, R. Tetrahedron: Asymmetry 1997, 8, 1015-1018.
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-
38
-
-
84899782272
-
-
note
-
(a) For the (R)-9-AHA ester of 6: DE = 0.93 (AM1), 0.93 (PM3).
-
-
-
-
39
-
-
84899778474
-
-
note
-
(b) For the (S)-9-AHA ester of 6: DE = 0.48 (AM1), 0.39 (PM3).
-
-
-
-
40
-
-
84899777368
-
-
note
-
2 in the systematic name. In those works, the sp conformer was defined by the synperiplanar disposition of the CαOMe and C=O groups.
-
-
-
-
41
-
-
84899771128
-
-
note
-
2)].
-
-
-
-
42
-
-
84899783204
-
-
note
-
1H NMR spectra was observed at ca. T = 243 K. Only data for the major form are given in the table. Assignment of the minor component is ambiguous because of its very low population.
-
-
-
-
43
-
-
0000979795
-
-
(R)-O-Phenyllactic acid was synthesized from (S)-ethyl lactate; see: Tottie, L.; Baeckstrom, P.; Moberg, C.; Tegenfeldt, J.; Heumann, A. J. Org. Chem. 1992, 57, 6579-6587.
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Tottie, L.1
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Heumann, A.5
-
44
-
-
84899778256
-
-
note
-
1H NMR data of the NHBoc group are very sensitive to experimental conditions and should not be used to derive the configuration (see ref 2h).
-
-
-
-
45
-
-
84899773246
-
-
note
-
4 in MeOH.
-
-
-
-
46
-
-
0029145724
-
-
Transformation of the trans-alcohol (41) into the diastereomeric cis-alcohol (42) was carried out by the Mitsunobu reaction; see: Takahashi, M.; Ogasawara, K. Tetrahedron: Asymmetry 1995, 6, 1617-1620.
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Takahashi, M.1
Ogasawara, K.2
-
47
-
-
84899782619
-
-
note
-
RS represents the difference between its chemical shift in the (1R,2S)-derivative and that in the (1S,2R)-derivative.
-
-
-
-
48
-
-
33845469694
-
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(a) Eis, M. J.; Wrobel, J. E.; Ganem, B. J. Am. Chem. Soc. 1984, 106, 3693-3694.
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Eis, M.J.1
Wrobel, J.E.2
Ganem, B.3
-
49
-
-
0030793714
-
-
RS values of the esters 19e, 12f, 19f, 12g, and 19g were measured after HPLC separation, whereas those of 6e, 12e, 6f, and 6g were directly measured from the spectra of the corresponding mixture.
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Mizuno, M.1
Kanai, M.2
Iida, A.3
Tomioka, K.4
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52
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33845376028
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Trost, B. M.; Belletire, J. L.; Godleski, S.; McDougal, P. G.; Balkovec, J. M.; Baldwin, J. J.; Christy, M.; Ponticello, G. S.; Varga, S. L.; Springer, J. P. J. Org. Chem. 1986, 51, 2370-2374.
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Baldwin, J.J.6
Christy, M.7
Ponticello, G.S.8
Varga, S.L.9
Springer, J.P.10
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