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(a) Sibi, M. P.; Patil, K. Angew. Chem., Int. Ed. 2004, 43, 1235-1238.
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(a) Eilitz, U.; Lessmann, F.; Seidelmann, O.; Wendisch, V. Tetrahedron: Asymmetry 2003, 14, 189-191.
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Eilitz, U.1
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Shimizu, S.7
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(b) Palacios, F.; de los Santos, J.; Aparacio, D. ARKIVOC 2005, 405-414.
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(c) Du, D.-M.; Lu, S.-F.; Fang, T.; Xu, J. J. Org. Chem. 2005, 70, 3712-3715.
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Li, H.1
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23
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33846176131
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3) δ 173.1, 80.3, 77.7, 63.1, 34.3, 17.0, 16.4, 14.2.
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3) δ 173.1, 80.3, 77.7, 63.1, 34.3, 17.0, 16.4, 14.2.
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25
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33846153313
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Olefin configurations for 3c-g were assigned based on the chemical shift values of the allylic protons, e.g., 2.11 ppm for (Z)-3c versus 2.60 ppm for the methyl ester of (E)-3c (ref 15a), as described by Denmark and Marcin (J. Org. Chem. 1993, 58, 3850-3856.).
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Olefin configurations for 3c-g were assigned based on the chemical shift values of the allylic protons, e.g., 2.11 ppm for (Z)-3c versus 2.60 ppm for the methyl ester of (E)-3c (ref 15a), as described by Denmark and Marcin (J. Org. Chem. 1993, 58, 3850-3856.).
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27
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33846179429
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4, and concentrated in vacuo.
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4, and concentrated in vacuo.
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28
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23044491254
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2-amino acids as hydrochloride salts. Spectral data matched those reported previously: Nejman, M.; Sliwinska, A.; Zwierzak, A. Tetrahedron 2005, 61, 8536-8541.
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2-amino acids as hydrochloride salts. Spectral data matched those reported previously: Nejman, M.; Sliwinska, A.; Zwierzak, A. Tetrahedron 2005, 61, 8536-8541.
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29
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0034597518
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Gangadhar, N.; Huber, V. J.; Lum, C.; Goodman, B. A. Org. Lett. 2000, 2, 3527-3529.
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Gangadhar, N.1
Huber, V.J.2
Lum, C.3
Goodman, B.A.4
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31
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0038690495
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Lee, H. S.; Park, J. D.; Kim, D. H. Bull. Korean Chem. Soc. 2003, 24, 467-472.
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Bull. Korean Chem. Soc
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Lee, H.S.1
Park, J.D.2
Kim, D.H.3
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0033616677
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(b) Xu, D.; Kohli, R. M.; Massey, V. Proc. Natl. Acad. Sci. U.S.A. 1999, 96, 3556-3561.
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Xu, D.1
Kohli, R.M.2
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34
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0037127208
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(c) Brown, B. J.; Hyun, J. w.; Duvvuri, S.; Karplus, P. A.; Massey, V. J. Biol. Chem. 2002, 277, 2138-2145.
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Brown, B.J.1
Hyun, J.W.2
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Karplus, P.A.4
Massey, V.5
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36
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33846140892
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In a preliminary experiment, E-3d was reduced by old yellow enzyme with largely (S)-stereoselectivity, as would be expected from the model in Scheme 2. This suggests that it may be possible to prepare the enantiomeric series of β-amino acids by using the alternate olefin isomers
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In a preliminary experiment, E-3d was reduced by old yellow enzyme with largely (S)-stereoselectivity, as would be expected from the model in Scheme 2. This suggests that it may be possible to prepare the enantiomeric series of β-amino acids by using the alternate olefin isomers.
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37
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33846140572
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The three byproducts were identified by GC/MS as (E)-3d, the alternate acrylate alkene regioisomer of 3d, and the water addition product from 3d (in racemic form).
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The three byproducts were identified by GC/MS as (E)-3d, the alternate acrylate alkene regioisomer of 3d, and the water addition product from 3d (in racemic form).
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38
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0035910865
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Kawai, Y.; Inaba, Y.; Tokitoh, N. Tetrahedron: Asymmetry 2001, 12, 309-318.
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(2001)
Tetrahedron: Asymmetry
, vol.12
, pp. 309-318
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Kawai, Y.1
Inaba, Y.2
Tokitoh, N.3
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