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85064428639
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First racemic synthesis: (b) Smrčina, M.; Lorenc, M.; Hanuš, V.; Kočovský, P. Synlett 1991, 231.
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First racemic synthesis: (b) Smrčina, M.; Lorenc, M.; Hanuš, V.; Kočovský, P. Synlett 1991, 231.
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3
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0001483608
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Kočovský, P.7
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First resolution: (d) Smrčina, M.; Vyskočil, Š.; Polívková, J.; Poláková, J.; Kočovský, P. Collect. Czech. Chem. Commun. 1996, 61, 1520.
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First resolution: (d) Smrčina, M.; Vyskočil, Š.; Polívková, J.; Poláková, J.; Kočovský, P. Collect. Czech. Chem. Commun. 1996, 61, 1520.
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(a) Larsen, A. O.; Leu, W.; Oberhuber, C. N.; Campbell, J. E.; Hoveyda, A. H. J. Am. Chem. Soc. 2004, 126, 11130.
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(b) Kacprzynski, M. A.; May, T. L.; Kazane, S. A.; Hoveyda, A. H. Angew. Chem. Int. Ed. 2007, 46, 4554;
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Chen, C.-T.7
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31
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62349134937
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5 g ca. 50 € [(R)-BINOL, ABCR; (S)-BINOL, AlfaAesar), 1 kg ca
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Enantiopure BINOL
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Enantiopure BINOL: 5 g ca. 50 € [(R)-BINOL, ABCR; (S)-BINOL, AlfaAesar), 1 kg ca. 900 $ [(R)- or (S)-BINOL, AK Scientific).
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900 $ [(R)- or (S)-BINOL, AK Scientific)
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32
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33847609216
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Ooi, T.; Ohmatsu, K.; Maruoka, K. J. Am. Chem. Soc. 2007, 129, 2410.
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(2007)
J. Am. Chem. Soc
, vol.129
, pp. 2410
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Ooi, T.1
Ohmatsu, K.2
Maruoka, K.3
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33
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62349130543
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S)-BINOL monotriflate (5.59 g, 13.4 mmol) was dissolved in CH2Cl2 (35 mL) and CH2(OMe)2 (35 mL, Then P4O10 (3.93 g, 13.8 mmol, 1.03 equiv) was added within 1 h in 2 portions. The mixture was stirred at r.t. for 7 h, poured into aq NH3 (35, 30 mL, and extracted with CH2Cl2 (3 x 10 mL, The combined organic phases were dried over MgSO4. Evaporation of the solvent under reduced pressure and flash chromatography on SiO2 (eluent: cyclohexane-EtOAc, 95:5) provided the MOM-protected (S)-BINOL monotriflate 518 5.90 g, 95, as a colorless oil. It crystallized slowly when transferred into a refrigerator
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18 (5.90 g, 95%) as a colorless oil. It crystallized slowly when transferred into a refrigerator.
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0037427994
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Acetalization method: Paleo, M. R.; Aurrecoechea, N.; Jung, K.-Y.; Rapoport, H. J. Org. Chem. 2003, 68, 130.
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Acetalization method: Paleo, M. R.; Aurrecoechea, N.; Jung, K.-Y.; Rapoport, H. J. Org. Chem. 2003, 68, 130.
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35
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62349120069
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See
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See: http://www.epa.gov/ttn/atw/hlthef/chlo-eth.html.
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36
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62349099087
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A suspension of benzylamine 6 (15.9 g, 38.0 mmol) and Pd (10% on C, 2.04 g, 1.99 mmol, 5 mol, in EtOAc (70 mL) was heated under H2 (1 atm) at 60°C for 3 h. After filtration through Celite, the solvent was removed under reduced pressure. The residue was dissolved in CH 2Cl2 (100 mL) and MeOH (100 mL, Concentrated H 2SO4 (6.0 mL) was added and the mixture refluxed for 2 h. Saturated aq NaHCO3 (100 mL) was added after cooling. The mixture was extracted with CH2Cl2 (3 x 50 mL, The combined organic phases were dried over MgSO4. Evaporation of the solvent under reduced pressure provided (S)-NOBIN (1; 9.19 g, 85, as a faintly yellow solid (pure as judged by 1H NMR, Recrystallization from toluene rendered rounded white needles (8.84 g, 82, On a smaller scale (3.29 g of benzylamine 6) the yield of recrystallized 1 was 1.97 g [88, cf. footno
-
1H NMR). Recrystallization from toluene rendered rounded white needles (8.84 g, 82%). On a smaller scale (3.29 g of benzylamine 6) the yield of recrystallized 1 was 1.97 g [88%; cf. footnote (e) of Scheme 1].
-
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37
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62349140529
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Enantiopure NOBIN: 1 g ca. 500 € [(R)- or (S)-NOBIN, ABCR], 10 g ca. 1500 $ [(R)-NOBIN], 50 g ca. 4000 $ [(S)-NOBIN, both Shanghai FWD Chemicals].
-
Enantiopure NOBIN: 1 g ca. 500 € [(R)- or (S)-NOBIN, ABCR], 10 g ca. 1500 $ [(R)-NOBIN], 50 g ca. 4000 $ [(S)-NOBIN, both Shanghai FWD Chemicals].
-
-
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38
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2342570828
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Perillo, I.; Caterina, M. C.; López, J.; Salerno, A. Synthesis 2004, 851.
-
(2004)
Synthesis
, pp. 851
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Perillo, I.1
Caterina, M.C.2
López, J.3
Salerno, A.4
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39
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62349119367
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3N) provided 10 (6.39 g, 89%) as a deep red oil.
-
3N) provided 10 (6.39 g, 89%) as a deep red oil.
-
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40
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62349106332
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The following conditions were adapted from a related transformation: 18 Cs2CO3 (7.51 g, 23.0 mmol, 1.30 equiv) was dried in vacuo with a heat gun for 30 min. After cooling, Pd(OAc)2 (395 mg, 1.76 mmol, 9.90 mol, o-Ph2PC6H 4)2O (1.89 g, 3.51 mmol, 20 mol, and a solution of the MOM-protected monotriflate 5 (8.22 g, 17.8 mmol) and the diamine 10 (4.09 g, 22.9 mmol, 1.29 equiv) in toluene (9 mL) were added. The suspension was degassed and stirred at 115°C for 14 h. Filtration through Celite, evaporation of the solvent under reduced pressure, and flash chromatography on SiO2 (eluent: cyclohexane-EtOAc, 90:10 → 80:20) provided the diamine 12 (7.79 g, 89, as a reddish-brown sticky solid. 1H NMR (400 MHz, CDCl3, TMS, δ, 1.91 (s, 2 x o-CH3, 2.17 (s, p-CH3, 2.95 ddd, 3J
-
3).
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