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Lübbers, T.1
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0004568212
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0026588815
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Leutenegger, U.1
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6
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84987265458
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(c) P. von Matt, G.C. Lloyd-Jones, A.B.E. Minidis, A. Pfaltz, L. Macko, M. Neuburger, M. Zehnder, H. Rüegger, P.S. Pregosin, Helv. Chim. Acta 1995, 78, 265-284.
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7
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1642324310
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B.M. Trost, D.L. Van Vranken, C. Bingel, J. Am. Chem. Soc. 1992, 114, 9327-9343.
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Trost, B.M.1
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8
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0000349766
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11
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0642339558
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-
The designation PHOX is derived from phosphino-oxazoline, and is in agreement with Prof. A. Pfaltz, Mülheim
-
(b) The designation PHOX is derived from phosphino-oxazoline, and is in agreement with Prof. A. Pfaltz, Mülheim.
-
-
-
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13
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0027196559
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(a) G.J. Dawson, C.G. Frost, J.M.J. Williams, S.J. Coote, Tetrahedron Lett. 1993, 34, 3149;
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Dawson, G.J.1
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Coote, S.J.4
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14
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84987181592
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(b) S.J. Coote, G.J. Dawson, C.G. Frost, J.M.J. Williams, Synlett 1993, 509-510.
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Coote, S.J.1
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15
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0028232428
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J.M. Brown, D.I. Hulmes, P.I. Guiry, Tetrahedron 1994, 50, 4493.
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17
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33744858845
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G. Koch, G.C. Lloyd-Jones, O. Loiseleur, A. Pfaltz, R. Prétôt, S. Schaffner, P. Schnider, P. von Matt, Recl. Trav. Chim. Pays-Bas 1995, 114, 206-210.
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Pfaltz, A.4
Prétôt, R.5
Schaffner, S.6
Schnider, P.7
Von Matt, P.8
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18
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37049079396
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and literature cited therein
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J.V. Allen, S.J. Coote, G.J. Dawson, C.G. Frost, C.J. Martin, J.M.J. Williams, J. Chem. Soc., Perkin Trans. 1 1994, 2065, and literature cited therein.
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19
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0027371990
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and earlier work cited therein
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H. Vorbrüggen, K. Krolikiewics, Tetrahedron 1993, 49, 9353-9372, and earlier work cited therein.
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Vorbrüggen, H.1
Krolikiewics, K.2
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20
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0029993806
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-
Full paper with experimental details: M. Peer, J.C. de Jong, M. Kiefer, Th. Langer, H. Rieck, H. Schell, P. Sennhenn, J. Sprinz, H. Steinhagen, B. Wiese, G. Helmchen, Tetrahedron 1996, 51, 7547-7583.
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Schell, H.6
Sennhenn, P.7
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Steinhagen, H.9
Wiese, B.10
Helmchen, G.11
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21
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0028209777
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P. von Matt, O. Loiseleur, G. Koch, A. Pfaltz, C. Lefeber, T. Feucht, G. Helmchen, Tetrahedron: Asymm. 1994, 5, 573.
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Lefeber, C.5
Feucht, T.6
Helmchen, G.7
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25
-
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0642278337
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-
Arguments in favor of a late transition state have been presented for allylic substitutions carried out with QUINAP as chiral ligand (ref. 9). Assumption of a late transition state also leads to preference for substitution trans to phosphorus
-
Arguments in favor of a late transition state have been presented for allylic substitutions carried out with QUINAP as chiral ligand (ref. 9). Assumption of a late transition state also leads to preference for substitution trans to phosphorus.
-
-
-
-
26
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0028349296
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(a) J. Sprinz, M. Kiefer, G. Helmchen, M. Reggelin, G. Huttner, O. Walter, L. Zsolnai, Tetrahedron Lett. 1994, 1523;
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Walter, O.6
Zsolnai, L.7
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27
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0642308841
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June 12-July 7, 1995, Eds. H. S. Rzepa, C. Leach, J. M. Goodman (CD-ROM), The Royal Society of Chemistry, ISBN 0 85404 899 5
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(b) G. Helmchen, J. Janssen, M. Kiefer, M. Peer, H. Rieck, P. Sennhenn, J. Sprinz in Electronic Conference on Trends in Organic Chemistry (ECTOC-1), June 12-July 7, 1995, Eds. H. S. Rzepa, C. Leach, J. M. Goodman (CD-ROM), The Royal Society of Chemistry, 1996; ISBN 0 85404 899 5;
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28
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0000302814
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(c) C. Breutel, P.S. Pregosin, R. Salzmann, A. Togni, J. Am. Chem. Soc. 1994, 116, 4067.
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Breutel, C.1
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29
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0642308845
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Investigations of solution structures, relation between exo/endo ratios and enantioselectivity, and an effort at direct determination of relative reaction rates by NMR methods are carried out in cooperation with Dr. M. Reggelin, Frankfurt a. M.
-
Investigations of solution structures, relation between exo/endo ratios and enantioselectivity, and an effort at direct determination of relative reaction rates by NMR methods are carried out in cooperation with Dr. M. Reggelin, Frankfurt a. M.
-
-
-
-
31
-
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0642278334
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The quality of the crystal of the complex α, R = i-Pr, did not allow determination of the structure with high precision. For this reason the crystal structure is represented by the formula α
-
The quality of the crystal of the complex α, R = i-Pr, did not allow determination of the structure with high precision. For this reason the crystal structure is represented by the formula α.
-
-
-
-
32
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0642278332
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Corresponding ligands with a ferrocene or a benzenechromium tricarbonyl moiety were also prepared and tested in catalytic allylic alkylations. A report (S. Kudis, G. Helmchen) on preparations and catalysis data will soon be published
-
Corresponding ligands with a ferrocene or a benzenechromium tricarbonyl moiety were also prepared and tested in catalytic allylic alkylations. A report (S. Kudis, G. Helmchen) on preparations and catalysis data will soon be published.
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-
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33
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37049086486
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G. Knühl, P. Sennhenn, G. Helmchen, J. Chem. Soc., Chem. Comm. 1995, 1845-1846.
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34
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0002454151
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G. Helmchen, G. Nill, Angew. Chem. 1979, 91, 66; Angew. Chem. Int. Ed. Engl. 1979, 18, 65.
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Helmchen, G.1
Nill, G.2
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35
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33745143200
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G. Helmchen, G. Nill, Angew. Chem. 1979, 91, 66; Angew. Chem. Int. Ed. Engl. 1979, 18, 65.
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36
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27844583173
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H. Werner, G. Erker (Eds.), Springer, Heidelberg
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G. Wilke in Organometallics in Organic Synthesis 2, H. Werner, G. Erker (Eds.), Springer, Heidelberg, 1989, p. 1.
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Wilke, G.1
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