-
1
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-
85037461779
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note
-
-1.
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-
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-
3
-
-
19744370478
-
-
R. W. Alder, P. S. Bowman, W. R. S. Steele, D. R. Winterman, J. Chem. Soc. Chem. Commun. 1968, 723-724.
-
(1968)
J. Chem. Soc. Chem. Commun.
, pp. 723-724
-
-
Alder, R.W.1
Bowman, P.S.2
Steele, W.R.S.3
Winterman, D.R.4
-
4
-
-
84990134893
-
-
Reviews: a) H. A. Staab, T. Saupe, Angew. Chem. 1988, 100, 895; Angew. Chem. Int. Ed. Engl. 1988, 27, 865-879;
-
(1988)
Angew. Chem.
, vol.100
, pp. 895
-
-
Staab, H.A.1
Saupe, T.2
-
5
-
-
84990134893
-
-
Reviews: a) H. A. Staab, T. Saupe, Angew. Chem. 1988, 100, 895; Angew. Chem. Int. Ed. Engl. 1988, 27, 865-879;
-
(1988)
Angew. Chem. Int. Ed. Engl.
, vol.27
, pp. 865-879
-
-
-
7
-
-
0030632978
-
-
C. L. Perrin, J. B. Nielson, Ann. Rev. Phys. Chem. 1997, 48, 511-544; C. L. Perrin, J. B. Nielson, Y. J. Kim, Ber. Bunsenges. Phys. Chem. 1998, 102, 403-409.
-
(1997)
Ann. Rev. Phys. Chem.
, vol.48
, pp. 511-544
-
-
Perrin, C.L.1
Nielson, J.B.2
-
8
-
-
0001222739
-
-
C. L. Perrin, J. B. Nielson, Ann. Rev. Phys. Chem. 1997, 48, 511-544; C. L. Perrin, J. B. Nielson, Y. J. Kim, Ber. Bunsenges. Phys. Chem. 1998, 102, 403-409.
-
(1998)
Ber. Bunsenges. Phys. Chem.
, vol.102
, pp. 403-409
-
-
Perrin, C.L.1
Nielson, J.B.2
Kim, Y.J.3
-
9
-
-
0001646493
-
-
For leading references see: a) Y. Kim, S. Lim, Y. Kim, J. Phys. Chem. A 1999, 103, 6632-6637;
-
(1999)
J. Phys. Chem. A
, vol.103
, pp. 6632-6637
-
-
Kim, Y.1
Lim, S.2
Kim, Y.3
-
11
-
-
0032567157
-
-
c) B. Schitt, B. B. Iversen, G. K. H. Madsen, T. C. Bruice, J. Am. Chem. Soc. 1998, 120, 12117-12124;
-
(1998)
J. Am. Chem. Soc.
, vol.120
, pp. 12117-12124
-
-
Schitt, B.1
Iversen, B.B.2
Madsen, G.K.H.3
Bruice, T.C.4
-
13
-
-
0031127432
-
-
a) J. A. Gerlt, M. M. Kreevoy, W. W. Cleland, P. A. Frey, Chem. Biol. 1997, 4, 259-267;
-
(1997)
Chem. Biol.
, vol.4
, pp. 259-267
-
-
Gerlt, J.A.1
Kreevoy, M.M.2
Cleland, W.W.3
Frey, P.A.4
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17
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85037482569
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note
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+ and proposed that the high basicity of 1a versus 1b is more likely to be due to relief of the steric strain present in 1a and not the formation of hydrogen bonds with very different strength. Based on the data presented herein, we draw a similar conclusion.
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18
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0000995427
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-
a = 0 condition is not special). For discussion see: K. N. Houk, J. Org. Chem. 1998, 63, 4611-4619.
-
(1998)
J. Org. Chem.
, vol.63
, pp. 4611-4619
-
-
Houk, K.N.1
-
19
-
-
0000565558
-
-
a) C. López, P. Lorente, R. M. Claramunt, J. Marín, C. Foces-Foces, A. L. Llamas-Saiz, J. Elguero, H.-H. Limbach, Ber. Bunsenges. Phys. Chem. 1998, 702, 414-418;
-
(1998)
Ber. Bunsenges. Phys. Chem.
, vol.702
, pp. 414-418
-
-
López, C.1
Lorente, P.2
Claramunt, R.M.3
Marín, J.4
Foces-Foces, C.5
Llamas-Saiz, A.L.6
Elguero, J.7
Limbach, H.-H.8
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22
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0001217163
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-
-, see: C. López, P. Lorente, R. M. Claramunt, A. L. Llamas-Saiz, C. Foces-Foces, J. Elguero, I. Sobrados, F. Aguilar-Parrilla, H.-H. Limbach, New. J. Chem. 1996, 20, 523-536.
-
(1996)
New. J. Chem.
, vol.20
, pp. 523-536
-
-
López, C.1
Lorente, P.2
Claramunt, R.M.3
Llamas-Saiz, A.L.4
Foces-Foces, C.5
Elguero, J.6
Sobrados, I.7
Aguilar-Parrilla, F.8
Limbach, H.-H.9
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23
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0000565558
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and references therein
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15N NMR spectroscopy, see: C. López, P. Lorente, R. M. Claramunt, J. Marín, C. Foces-Foces, A. L. Llamas-Saiz, J. Elguero, H.-H. Limbach, Ber. Bunsenges. Phys. Chem. 1998, 102, 414-418 and references therein.
-
(1998)
Ber. Bunsenges. Phys. Chem.
, vol.102
, pp. 414-418
-
-
López, C.1
Lorente, P.2
Claramunt, R.M.3
Marín, J.4
Foces-Foces, C.5
Llamas-Saiz, A.L.6
Elguero, J.7
Limbach, H.-H.8
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24
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85037476844
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see reference [5] in F. Hibbert, H. J. Robbins
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A value of 0.9 has been reported by A. J. Kresge et al., see reference [5] in F. Hibbert, H. J. Robbins, Chem. Commun. 1980, 141-142.
-
(1980)
Chem. Commun.
, pp. 141-142
-
-
Kresge, A.J.1
-
25
-
-
33751158529
-
-
J. A. Platts, S. T. Howard, K. Wozniak, J. Org. Chem. 1994, 59, 4647-4651.
-
(1994)
J. Org. Chem.
, vol.59
, pp. 4647-4651
-
-
Platts, J.A.1
Howard, S.T.2
Wozniak, K.3
-
26
-
-
0032565849
-
-
a) J. P. H. Charmant, G. C. Lloyd-Jones, T. M. Peakman, R. L. Woodward, Tetrahedron Lett. 1998, 39, 4733-4736;
-
(1998)
Tetrahedron Lett.
, vol.39
, pp. 4733-4736
-
-
Charmant, J.P.H.1
Lloyd-Jones, G.C.2
Peakman, T.M.3
Woodward, R.L.4
-
27
-
-
0032840169
-
-
b) J. P. H. Charmant, G. C. Lloyd-Jones, T. M. Peakman, R. L. Woodward, Eur. J. Org. Chem. 1999, 2501-2510.
-
(1999)
Eur. J. Org. Chem.
, pp. 2501-2510
-
-
Charmant, J.P.H.1
Lloyd-Jones, G.C.2
Peakman, T.M.3
Woodward, R.L.4
-
28
-
-
0002395403
-
-
G. Gunnarsson, H. Wennerström, W. Egon, S. Forsén, Chem. Phys. Lett. 1976, 38, 96-99.
-
(1976)
Chem. Phys. Lett.
, vol.38
, pp. 96-99
-
-
Gunnarsson, G.1
Wennerström, H.2
Egon, W.3
Forsén, S.4
-
29
-
-
85044492384
-
-
S. Humble, C. J. Hlakides, J. D. Keltner, M. Messina, Chem. Phys. Lett. 1998, 259, 90-96.
-
(1998)
Chem. Phys. Lett.
, vol.259
, pp. 90-96
-
-
Humble, S.1
Hlakides, C.J.2
Keltner, J.D.3
Messina, M.4
-
31
-
-
0001234687
-
-
K. G. Orrell, V. Sik, D. Stephenson, Prog. NMR Spectroscopy 1990, 22, 141-208.
-
(1990)
Prog. NMR Spectroscopy
, vol.22
, pp. 141-208
-
-
Orrell, K.G.1
Sik, V.2
Stephenson, D.3
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32
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85037474293
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note
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+ and compatibility with 2.
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-
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33
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0003909854
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Wiley, Chichester
-
For a discussion of systematic errors and inaccuracies in DNMR see, for example : a) H. Günther, in NMR spectroscopy, 2nd ed., Wiley, Chichester, 1995;
-
(1995)
NMR Spectroscopy, 2nd Ed.
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-
Günther, H.1
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35
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85037459907
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note
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Single crystals were powdered in the bottom of the NMR tube with the end of a glass capillary that had been rounded by melting. Care was taken so that grinding in the solid state would not induce thermal equilibration. The NMR tube was then immersed in an octane-dry ice cooling bath, solvent added and the rounded capillary used to agitate the mixture until dissolution was complete.
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36
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85037449761
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note
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- which is fully equilibrated as it is generated. Any water in the reaction system at the start is sequestered by precipitation with the salt and thus in the latter stages of reaction the system is essentially anhydrous.
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38
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85037460377
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note
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+ and 1. However, the measurement was complicated by a side reaction that resulted in extensive debenzylation.
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39
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85037485927
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note
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Evidently, the diastereoisomers cannot directly interconvert since the hydrogen bond must be broken before or during the process and then reformed. In other words the hydrogen is acting as a lock (albeit inefficient). See also reference [30].
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42
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85037470431
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note
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We are still trying to prepare 6. However, thus far eight different synthetic routes have been devised and tested. All have proved unsuccessful and this attests to the steric congestion of such a system.
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45
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33646419221
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R. W. Alder, Chem. Rev. 1989, 89, 1215-1223.
-
(1989)
Chem. Rev.
, vol.89
, pp. 1215-1223
-
-
Alder, R.W.1
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46
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85037485796
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note
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[12].
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47
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85037473125
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note
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[8]
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48
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0000266836
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a) M. L. Kaplan, F. A. Bovey, H. N. Cheng, Anal. Chem. 1975, 47, 1703-1705;
-
(1975)
Anal. Chem.
, vol.47
, pp. 1703-1705
-
-
Kaplan, M.L.1
Bovey, F.A.2
Cheng, H.N.3
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51
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84888886156
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Leipold Associates, USA
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Commercial software (Leipold Associates, USA).
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Commercial Software
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