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0027478958
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A preliminary account has appeared: Itoh, T.; Hiyama, Y.; Betchaku, A.; Tsukube, H. Tetrahedron Lett. 1993, 34, 2617.
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A preliminary account has appeared: Itoh, T.; Hiyama, Y.; Betchaku, A.; Tsukube, H. Tetrahedron Lett. 1993, 34, 2617.
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2
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0022110867
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and references cited therein. For example, see
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For example, see: Itoh, T.; Takagi, Y.; Nishiyama, S. J. Org. Chem. 1991, 56, 1521 and references cited therein.
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(a) Sakurai, T.; Margolin, A. L.; Russell, A. J.; Klivanov, A. M. J. Am. Chem. Soc. 1988, 110, 7236.
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12
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0027990305
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Control of enzyme enantioselectivity by pressure change has recently been reported
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(e) Arroyo, M.; Sinisterra, J. V. J. Org. Chem. 1994, 59, 4410. Control of enzyme enantioselectivity by pressure change has recently been reported.
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Arroyo, M.1
Sinisterra, J.V.2
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0001699388
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and references cited therein
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(f) Kamat, S. V.; Beckman, E. J.; Russell, A. J. J. Am. Chem. Soc. 1993, 115, 8845 and references cited therein.
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Kamat, S.V.1
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14
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76049100665
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5g were reported as effective additives. (a) Guo, Z.-W.; Sih, C. J. J. Am. Chem. Soc. 1989, 111, 6839.
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5g were reported as effective additives. (a) Guo, Z.-W.; Sih, C. J. J. Am. Chem. Soc. 1989, 111, 6839.
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-
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15
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0000019557
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(b) Itoh, T.; Ohira, E.; Takagi, Y.; Nishiyama, S.; Nakamura, K. Bull. Chem. Soc. Jpn. 1991, 64, 624.
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Itoh, T.1
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Takagi, Y.3
Nishiyama, S.4
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16
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37049069019
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(c) Tsukube, H.; Betchaku, A.; Hiyama, Y.; Itoh, T. J. Chem. Soc., Chem. Commun. 1992, 1751.
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Tsukube, H.1
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Hiyama, Y.3
Itoh, T.4
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17
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0025737085
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(d) Holmberg, E.; Holmquist, M.; Hedenstrom, E.; Berglund, P.; Norin, T.; Hogberg, H.-E.; Hult, K. Appl. Microbiol. Biotechnol. 1992, 35, 572.
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Holmberg, E.1
Holmquist, M.2
Hedenstrom, E.3
Berglund, P.4
Norin, T.5
Hogberg, H.-E.6
Hult, K.7
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18
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0027962938
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(e) Khmelnitsky, Y. L.; Welch, S. H.; Clark, D. S.; Dordick, J. S. J. Am. Chem. Soc. 1994, 116, 2647.
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Khmelnitsky, Y.L.1
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Dordick, J.S.4
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19
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0001437170
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(f) Tsukube, H.; Hiyama, Y.; Betchaku, A.; Itoh, T. J. Org. Chem. 1994, 59, 7014.
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Tsukube, H.1
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Betchaku, A.3
Itoh, T.4
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20
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0028265843
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Bhaskar, Rao A.; Rehman, H.; Krishnakumari, B.; Yadav, J. S. Tetrahedron Lett. 1994, 35, 2611.
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(g) Bhaskar, Rao A.; Rehman, H.; Krishnakumari, B.; Yadav, J. S. Tetrahedron Lett. 1994, 35, 2611.
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-
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22
-
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0000012655
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(b) Reinhoudt, D. N.; Eondebak, A. M.; Nijenhuis, W. F.; Verboom, W.; Kloosterman, M.; Schoemaker, H. E. Ibid. 1989, 399.
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Reinhoudt, D.N.1
Eondebak, A.M.2
Nijenhuis, W.F.3
Verboom, W.4
Kloosterman, M.5
Schoemaker, H.E.6
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23
-
-
76049108903
-
-
-3 mmol/g of lipase PS.
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-3 mmol/g of lipase PS.
-
-
-
-
24
-
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0000787818
-
-
Chen, C. -S.; Fujimoto, Y.; Girdauskas, G.; Sih, C. J. J. Am. Chem. Soc. 1982, 102, 7294.
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Chen, C.-S.1
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Girdauskas, G.3
Sih, C.J.4
-
25
-
-
33845282987
-
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Chen, C-S.; Wu, S-H.; Girdauskas, G.; Sih, C. J. Ibid. 1987, 109, 2812. The enantiomeric ratio was calculated from E ln[(1 - c)(1 - ee(S)-1)]/ln[(1 - c)(1 + ee(S)-1)], where c means conversion ratio and c ) ee(S)-1/(ee(S)-1 + ee(R)-2).
-
Chen, C-S.; Wu, S-H.; Girdauskas, G.; Sih, C. J. Ibid. 1987, 109, 2812. The enantiomeric ratio was calculated from E ) ln[(1 - c)(1 - ee(S)-1)]/ln[(1 - c)(1 + ee(S)-1)], where c means conversion ratio and c ) ee(S)-1/(ee(S)-1 + ee(R)-2).
-
-
-
-
26
-
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76049096226
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-
We have reported the E value of this control experiment as 7-8 based on results of 19F NMR analysis of, -α-methoxy-α- phenyl-α-(trifluoromethlyl)acetate (MTPA ester method).1 GPC analysis of all experiments gave slightly higher E values than those obtained using MTPA ester method.10 In the MTPA ester method, the remaining acetate was first converted to alcohol by LAH reduction and then to the corresponding MTPA ester.5b Since kinetic resolution may occur during the MTPA formation process, capillary GPC analysis provided us highly reliable results
-
5b Since kinetic resolution may occur during the MTPA formation process, capillary GPC analysis provided us highly reliable results.
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-
-
-
28
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-
76049095498
-
-
(S)-28 was derived from (S)-isopropylideneglycerol by a modification of the published method: Miyazaki, T.; Yanagita, S.; Itoh, A.; Okahara, M. Bull. Chem. Soc. Jpn. 1982, 55, 2005. For the method of preparation, see reference 5f.
-
(S)-28 was derived from (S)-isopropylideneglycerol by a modification of the published method: Miyazaki, T.; Yanagita, S.; Itoh, A.; Okahara, M. Bull. Chem. Soc. Jpn. 1982, 55, 2005. For the method of preparation, see reference 5f.
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29
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0023385987
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Patai, S, Rappoport, Z, Eds, John Wiley & Sons: Chichester
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Goldberg, I.1
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76049117405
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Hatano, A.; Ijiro, K.; Okahata, Y. The 6th Conference of Synthetic Organic Chemistry Using Biocatalysts, Seto Japan, January 1994, Abst No. 2017
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Holmquist, M.; Martinelle, M.; Berglund, P.; Clausen, I. G.; Patkar, S.; Svendsen, A.; Hult, K. J. J. Protein Chem. 1993, 12, 749.
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Holmquist, M.1
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Patkar, S.5
Svendsen, A.6
Hult, K.J.7
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34
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0343841133
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Alberghina, L, Schmid, R. D, Verger, R, Eds, VCH: New York
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(a) Rubin, B.; Jamison, P.; Harrison, D. Lapases: Structure, Mechanism and Genetic Engineering; Alberghina, L.; Schmid, R. D.; Verger, R., Eds.; VCH: New York, 1991; pp 63-66.
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Rubin, B.1
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Harrison, D.3
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35
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0027160452
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(b) Grochulski, P.; Li, Y.; Schrag, J. D.; Bouthillier, F.; Smith, P.; Harrison, D.; Rubin, B.; Cygler, M. J. Biol. Chem. 1993, 268, 12843.
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Smith, P.5
Harrison, D.6
Rubin, B.7
Cygler, M.8
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36
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0028103723
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Grochulski, P.; Li, Y.; Schrag, J. D.; Cygler, M. Protein Sci. 1994, 3, 82.
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37
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33751155794
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Colton, I. J.; Sharmin, N. A.; Kazlauskas, R. J. J. Org. Chem. 1995, 60, 212.
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Colton, I.J.1
Sharmin, N.A.2
Kazlauskas, R.J.3
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38
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76049102257
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We employed thiacrown 23 as an additive in hydrolysis of 2-substituted-2-propenyl acetates or 1-alkyl-3-cyanopropyl acetates. Hydrolysis rate of all substrates was accelerated by addition of 5 mol % of thiacrown 23, but enantioselectivity strongly depended on the nature of the substrate. Significant enhancement of enantioselectivity was observed when the original E values were from 7 to 15.
-
We employed thiacrown 23 as an additive in hydrolysis of 2-substituted-2-propenyl acetates or 1-alkyl-3-cyanopropyl acetates. Hydrolysis rate of all substrates was accelerated by addition of 5 mol % of thiacrown 23, but enantioselectivity strongly depended on the nature of the substrate. Significant enhancement of enantioselectivity was observed when the original E values were from 7 to 15.
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-
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39
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0027493648
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Yang, L.; Weber, A. E.; Greenlee, W. J.; Patchett, A. A. Tetrahedron Lett. 1993, 34, 7035.
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(1993)
Tetrahedron Lett
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Yang, L.1
Weber, A.E.2
Greenlee, W.J.3
Patchett, A.A.4
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