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0347538491
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note
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Iodocyclization of the corresponding E-isomer under the established conditions proceeded with poor enatioselectivity and moderate chemical conversion (11% ee and 50% yield).
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0030860279
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(b) Tokunaga, M.; Larrow, J. F.; Kakiuchi, F.; Jacobsen, E. N. Science 1997, 277, 936.
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note
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To investigate the possible involvement of HCl in the cyclization, which might be generated in situ, iodocyclization of 6 was carried out using 0.15 equiv of NCS and 0.6 equiv of HCl instead of 0.75 equiv of NCS to provide (R)-7 in 81% ee and 39% yield.
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0346277469
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note
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The preparation method of (R,R)-salen-Co(111)Cl was gratefully provided by Mr. Sang Kyun Kim from Prof. Jacobsen's group at Harvard University. Hong, J. Ph.D. Thesis, Harvard University, Cambridge, Massachusetts, 2001.
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0032506979
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(b) Palucki. M.; Finney, N. S.; Pospisil, P. J.; Güler, M. L.; Ishida, T.; Jacobsen. E. N. J. Am. Chem. Soc. 1998, 120, 948.
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Palucki, M.1
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Ishida, T.5
Jacobsen, E.N.6
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0346277468
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note
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Iodocyclization of 6 was scaled up to 2.6 mmol with comparable enantioselectivity and chemical yield (85% ee and 89% yield).
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