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72849146841
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see: (c) ref lie
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2Zn and 8 mol % of chiral bisoxazolidine; see: (c) ref lie.
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51
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72849115183
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2 (0% ee)
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2 (0% ee).
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53
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72849130671
-
-
Use of 2-Me-THF at -15 °C resulted in the partial suspension of CuOAc/1 catalyst. Use of 5 mol % of catalyst loading gave (5)-4a in 75% yield and 83% ee
-
Use of 2-Me-THF at -15 °C resulted in the partial suspension of CuOAc/1 catalyst. Use of 5 mol % of catalyst loading gave (5)-4a in 75% yield and 83% ee.
-
-
-
-
54
-
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72849152875
-
-
2Zn in toluene at 0 °C gave 40% ee and 54% ee, respectively
-
2Zn in toluene at 0 °C gave 40% ee and 54% ee, respectively.
-
-
-
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55
-
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0027397028
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2O was previously discussed; see: (a) Sasai, H.; Suzuki, T.; Itoh, N.; Shibasaki, M. Tetrahedron Lett. 1993, 34, 851.
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72849111016
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See also ref 17c
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(b)See also ref 17c.
-
-
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57
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72849123165
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For recent contributions, see refs 16 and 17 and references cited therein
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For two mechanistic models, see: (a) Seebach, D.; Beck, A. K.; Mukhopadhyay, T.; Thomas, E. Helv. Chim. Acta 1982, 65, 1101. For recent contributions, see refs 16 and 17 and references cited therein.
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58
-
-
72849133710
-
-
21-OH group protected), significantly lower ee's were observed (0% ee and 23% ee)
-
21-OH group protected), significantly lower ee's were observed (0% ee and 23% ee).
-
-
-
-
59
-
-
72849108453
-
-
2OH (72% ee), PhOH (70% ee)
-
2OH (72% ee), PhOH (70% ee).
-
-
-
-
60
-
-
72849142988
-
-
2 resulted in 11% ee while 20 mol % of 1, ethylene glycol, or ethanolamine gave products with 40-50% ee
-
2 resulted in 11% ee while 20 mol % of 1, ethylene glycol, or ethanolamine gave products with 40-50% ee.
-
-
-
-
61
-
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72849106258
-
-
Employment of 1-nitropropane gave results similar to those of nitroethane, but the chiral HPLC separations for these products are not fully resolved using AS-H, AD-H, and OD-H columns. Our full account for these cases will be reported elsewhere
-
Employment of 1-nitropropane gave results similar to those of nitroethane, but the chiral HPLC separations for these products are not fully resolved using AS-H, AD-H, and OD-H columns. Our full account for these cases will be reported elsewhere.
-
-
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