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0029892659
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(b) Seki, M.; Furutani, T.; Miyake, T.; Yamanaka, T.; Ohmizu, H. Tetrahedron Asymmetry 1996, 7, 1241-1244.
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Seki, M.1
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Ohmizu, H.5
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16
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85047671862
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4. 7: 8.40 (brs, 1H), 7.59-7.70 (m, 1H), 7.29-7.39 (m, 1H), 7.23 (brs, 1H), 6.79-6.92 (m, 2H), 6.32 (brs, 1H), 4.78 (brs, 1H), 3.97-4.15 (m, 1H), 3.59-3.81 (m, 2H), 2.66 (q, J=6.1 Hz, 1H), 1.24 (d, J=6.3 Hz, 3H). A similar unfavorable breakdown of the chiral auxiliary was observed with the chiral 2-oxazolidinone auxiliary: Adamczyk, M.; Mattingly, P. G.; Pan, Y. Tetrahedron Lett. 1995, 36, 5303-5306.
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Adamczyk, M.1
Mattingly, P.G.2
Pan, Y.3
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18
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0022507220
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3CN, which are not suitable for a large scale preparation: Evans, D. A.; Sjogren, E. B. Tetrahedron Lett. 1986, 27, 4961-4964.
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Evans, D.A.1
Sjogren, E.B.2
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21
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0026628984
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9. An excellent synthesis of the key intermediate for carbapenems based on the asymmetric Michael addition was reported by Yamamoto et. al: Yamamoto, Y.; Asao, N.; Uyehara, T. J. Am. Chem. Soc. 1992, 114, 5427-5429.
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Yamamoto, Y.1
Asao, N.2
Uyehara, T.3
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22
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85030208007
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note
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25 -21.7 ° (c, 0.94, MeOH).
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23
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85030209753
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note
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25 -20.1 ° (c, 0.67, MeOH).
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24
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85030200034
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3
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3
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25
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0000719337
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13. Kobayashi, S.; Iimori, T.; Izawa, T.; Ohno, M. J. Am. Chem. Soc. 1981, 103, 2406-2408.
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J. Am. Chem. Soc.
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Kobayashi, S.1
Iimori, T.2
Izawa, T.3
Ohno, M.4
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26
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85030208311
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note
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3)].
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