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23
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1642333679
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note
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1% TFA quench followed by silica gel chromatography.
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24
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1642361338
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note
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All spectroscopic and analytical properties were consistent with the structures assigned.
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25
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1642325596
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note
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Developed for the purpose of high throughput screening avoiding an aqueous work up.
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26
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1642345102
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note
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The crystals of 12b repeatedly cracked on cooling at about 125 K, which indicated a phase transition at this temperature hence the X-ray data were finally collected at 200 K. The molecule 12b in crystal (Figure 1) shows severe disorder of both ethyl-groups and terminal carbonyl group. The molecule has a trans-configuration around C3=C4 double bond, the conformation around P-N bond is characterised by a torsion angle for O1, P1, N1, C1 of -349(3)°. The molecules of 12b in the crystal are linked together by strong hydrogen bonds N-H⋯O = P(x + 1, y z) (N⋯O 2873(3)Å), forming chains parallel to a-axis.
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27
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0042826637
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The zinc-binol complex was prepared in situ from diethyl zinc and dry (S)-binol: (a) Sakane, S.; Muruoka, K.; Yamamoto, H. Tetrahdron Lett. 1985, 26, 5536. (b) Corminboeuf, O.; Renaud, P. Org. Lett. 2002, 4, 1735. (c) Du, H.; Long, J.; Hu, J.; Li, X.; Ding, K. Org. Lett. 2002, 4, 4349.
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Sakane, S.1
Muruoka, K.2
Yamamoto, H.3
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28
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0012126853
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The zinc-binol complex was prepared in situ from diethyl zinc and dry (S)-binol: (a) Sakane, S.; Muruoka, K.; Yamamoto, H. Tetrahdron Lett. 1985, 26, 5536. (b) Corminboeuf, O.; Renaud, P. Org. Lett. 2002, 4, 1735. (c) Du, H.; Long, J.; Hu, J.; Li, X.; Ding, K. Org. Lett. 2002, 4, 4349.
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Corminboeuf, O.1
Renaud, P.2
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0013263752
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The zinc-binol complex was prepared in situ from diethyl zinc and dry (S)-binol: (a) Sakane, S.; Muruoka, K.; Yamamoto, H. Tetrahdron Lett. 1985, 26, 5536. (b) Corminboeuf, O.; Renaud, P. Org. Lett. 2002, 4, 1735. (c) Du, H.; Long, J.; Hu, J.; Li, X.; Ding, K. Org. Lett. 2002, 4, 4349.
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Du, H.1
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31
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1642294617
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note
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Asymmetric induction was determined using chiral HPLC on a Chiralpak OD column using i-PrOH-hexane as eluant (96:4) for 3a and 3b; (94:6) for 3c; and (97:3) for 3e.
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32
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1642382563
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Ciardelli, F.; Salvadori, P., Eds.; Heyden: London, Chap. 32
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(a) Snatzke, G.; Snatzke, F. In Fundamental Aspects and Recent Developments in ORD and CD; Ciardelli, F.; Salvadori, P., Eds.; Heyden: London, 1967, Chap. 32, 109.
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Sztaricskai, F.4
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