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[2a] B. Bonnländer, B. Baderschneider, M. Messerere, P. Winterhalter, J. Agric. Food Chem. 1998, 46, 1474-1478.
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8
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[6a] C. G. Frost, J. Howarth, J. M. J. Williams, Tetrahedron Asymmetry 1992, 3, 1089-1122.
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9
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0002795445
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Ed.: I. Ojima, VCH, Weinheim
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[6b] T. Hayashi, in: Catalytic Asymmetric Synthesis, (Ed.: I. Ojima), VCH, Weinheim, 1993, pp 325-365.
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(1993)
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, pp. 325-365
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Hayashi, T.1
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10
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0010441430
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Houben-Weyl E21
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Eds.: G. Helmchen, R. W. Hoffmann, J. Mulzer, E. Schaumann
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[6c] T. Lubbers, P. Metz in Houben-Weyl E21, Stereoselective Synthesis (Eds.: G. Helmchen, R. W. Hoffmann, J. Mulzer, E. Schaumann), 1995, pp. 2371-2473 and 5643-5676.
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, pp. 2371-2473
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Lubbers, T.1
Metz, P.2
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13
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0342827745
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note
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2-Cyclohen-1-yl chloride or bromide as substrates gave markedly lower enantioselectivity than the acetate.
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-
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14
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0000960511
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[8a] S. Kudis, G. Helmchen, Angew. Chem. 1998, 110, 3210-3212; Angew. Chem. Int. Ed. 1998, 37, 3047-3050.
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Kudis, S.1
Helmchen, G.2
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15
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0032538768
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[8a] S. Kudis, G. Helmchen, Angew. Chem. 1998, 110, 3210-3212; Angew. Chem. Int. Ed. 1998, 37, 3047-3050.
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16
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0028114605
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[8b] P. Sennhenn, B. Gabler, G. Helmchen, Tetrahedron Lett. 1994, 35, 8595-8598.
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Sennhenn, P.1
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17
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0006989799
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[8c] G. Helmchen, S. Kudis, P. Sennhenn, H. Steinhagen, Pure Appl. Chem. 1997, 69, 513-518.
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Helmchen, G.1
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20
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37049086486
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G. Knühl, P. Sennhenn, G. Helmchen, J. Chem. Soc., Chem. Commun. 1995, 1845-1846.
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Knühl, G.1
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Helmchen, G.3
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24
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0343262188
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-
note
-
Alternatively, malonate (+)-3 was saponified and the resultant carboxylic acid decarboxylated by heating. This procedure caused formation of substantial amounts of side products and purification of the iodolactone was difficult.
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25
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0000902127
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The facility of purification of the iodolactone was independently found by us (ref.[7b]) and by the Scheffold group: T. Troxler, R. Scheffold, Helv. Chim. Acta 1994, 77, 1193-1202.
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Troxler, T.1
Scheffold, R.2
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26
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33845375310
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[14a] D. P. Curran, M.-H. Chen, D. Leszcweski, R. L. Elliot, D. M. Rakiewiecz, J. Org. Chem. 1986, 51, 1612-1614.
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Curran, D.P.1
Chen, M.-H.2
Leszcweski, D.3
Elliot, R.L.4
Rakiewiecz, D.M.5
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28
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0342827387
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Dissertation, Universität Würzburg
-
The choice of this CH-acid was based on previous work of our group: R. Wierzchowski, Dissertation, Universität Würzburg, 1985.
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(1985)
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Wierzchowski, R.1
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30
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37049097935
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G. Buono, G. Pfeiffer, A. Mortreux, F. Petit, J. Chem. Soc., Chem. Commun. 1980, 937-939.
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Buono, G.1
Pfeiffer, G.2
Mortreux, A.3
Petit, F.4
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31
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0343697881
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-
note
-
Using the same procedure ( + )-5 of 95% ee gave enantiomerically pure (-)-6 after recrystallization (yield: 82%).
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