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34247492713
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31
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34247497606
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38
-
-
44449110336
-
-
note
-
The (R)- and (S)-enantiomer of active ester 10 can be synthesised in 92% and 88%, respectively.
-
-
-
-
39
-
-
44449148570
-
-
note
-
The data relating to the single crystal X-ray structures of (R)-10 has been deposited at the Cambridge Crystallographic Database {CCDC reference number 683188}.
-
-
-
-
40
-
-
44449127854
-
-
note
-
The absolute configurations of each diastereoisomer were assigned by stereospecific synthesis; see Section 4 for details.
-
-
-
-
41
-
-
33947330923
-
-
Eames J., Boyd E., Chavda S., Eames J., and Yohannes Y. Tetrahedron: Asymmetry 18 (2007) 476-482
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Eames, J.1
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-
42
-
-
44449121586
-
-
note
-
The configurational assignment was determined through stereospecific synthesis.
-
-
-
-
43
-
-
36249028791
-
-
Boyd E., Chavda S., Coulbeck E., Coumbarides G.S., Dingjan M., Eames J., Flinn A., Motevalli M., Northen J., and Yohannes Y. Tetrahedron: Asymmetry 18 (2007) 2515-2530
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Boyd, E.1
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Yohannes, Y.10
-
44
-
-
44449099423
-
-
note
-
An equimolar amount of (R)-4-Li and rac-13 gave the corresponding adduct (S,R)-syn-14 in 48% yield with 60% de (reported in Yohannes, Y. PhD Thesis, University of London, 2004).
-
-
-
-
45
-
-
44449171720
-
-
note
-
1H NMR spectroscopy.
-
-
-
-
53
-
-
44449140725
-
-
note
-
The low recoverability of the oxazolidinone (S)-9 was due to its insoluble nature.
-
-
-
-
57
-
-
3843095145
-
-
For a comprehensive account of endo-cleavage of 4-alkyl substituted-5,5-dimethyl-oxazolidin-2-ones (known as SuperQuats) see:
-
For a comprehensive account of endo-cleavage of 4-alkyl substituted-5,5-dimethyl-oxazolidin-2-ones (known as SuperQuats) see:. Davies S.G., Hunter I.A., Nicholson R.L., Roberts P.M., Savory E.D., and Smith A.D. Tetrahedron: Asymmetry 60 (2004) 7553-7577
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-
Davies, S.G.1
Hunter, I.A.2
Nicholson, R.L.3
Roberts, P.M.4
Savory, E.D.5
Smith, A.D.6
-
59
-
-
44449106829
-
-
note
-
2 prior to use.
-
-
-
-
60
-
-
44449105300
-
-
note
-
1H NMR spectroscopy.
-
-
-
-
62
-
-
44449117726
-
-
note
-
The enantiomeric excess was determined by DCC coupling with either (R)- or (S)-1-phenylethanol.
-
-
-
-
63
-
-
0037458693
-
-
Moreno-Dorado F.J., Guerra F.M., Ortega M.J., Zubia E., and Massanet G.M. Tetrahedron: Asymmetry 14 (2003) 503-510
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Moreno-Dorado, F.J.1
Guerra, F.M.2
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Zubia, E.4
Massanet, G.M.5
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65
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33845280542
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Benson S.C., Cai P., Colon M., Haiza M.A., Tokles M., and Snyder J.K. J. Org. Chem. 53 (1988) 5335-5341
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