-
2
-
-
0003479152
-
-
Springer, New York, 5th edn, For recent reviews, see:
-
K. Faber, Biotransformations in Organic Chemistry, Springer, New York, 5th edn, 2004
-
(2004)
Biotransformations in Organic Chemistry
-
-
Faber, K.1
-
11
-
-
0033517692
-
-
M. M. Green J.-W. Park T. Sato A. Teramoto S. Lifson R. L. B. Selinger J. V. Selinger Angew. Chem., Int. Ed. 1999 38 3138
-
(1999)
Angew. Chem., Int. Ed.
, vol.38
, pp. 3138
-
-
Green, M.M.1
Park, J.-W.2
Sato, T.3
Teramoto, A.4
Lifson, S.5
Selinger, R.L.B.6
Selinger, J.V.7
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22
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27544455742
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-
Helical poly(phenylacetylene)s with a controlled helicity can also be prepared by the helix-sense-selective polymerization of an achiral phenylacetylene or based on the noncovalent helicity induction and chiral memory concept.
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V. Percec J. G. Rudick M. Peterca M. Wagner M. Obata C. M. Mitchell W.-D. Cho V. S. K. Balagurusamy P. A. Heiney J. Am. Chem. Soc. 2005 127 15257
-
(2005)
J. Am. Chem. Soc.
, vol.127
, pp. 15257
-
-
Percec, V.1
Rudick, J.G.2
Peterca, M.3
Wagner, M.4
Obata, M.5
Mitchell, C.M.6
Cho, W.-D.7
Balagurusamy, V.S.K.8
Heiney, P.A.9
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28
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33750884601
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For more details, see electronic supplementary information (ESI) According to Kazlauskas' rule, the R-secondary alcohols are preferentially esterified during the lipase-catalyzed kinetic resolution of racemic secondary alcohols. Therefore, the absolute configurations of the optically active 1 and 2 obtained by the kinetic resolution of rac- 1 with lipase were tentatively assigned as S and R, respectively. For Kazlauskas' rule, see:
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T. Hasegawa K. Maeda H. Ishiguro E. Yashima Polym. J. 2006 38 912
-
(2006)
Polym. J.
, vol.38
, pp. 912
-
-
Hasegawa, T.1
Maeda, K.2
Ishiguro, H.3
Yashima, E.4
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29
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0028134021
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Copolymerization results of (S)- 1 and (R)- 2 at varying monomer feed ratios ([(S)- 1]: [(R)- 2] = 1: 9, 3: 7, 5: 5, 7: 3, and 9: 1) showed that the polymerizability of (S)- 1 is almost identical to that of (R)- 2 and that the monomer distributions in the copolymer, poly((S)- 1-co-(R)- 2), are mostly random, independent of the level of monomer conversions
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M. Cygler P. Grochulski R. J. Kazlauskas J. D. Schrag F. Bouthillier B. Rubin A. N. Serreqi A. K. Gupta J. Am. Chem. Soc. 1994 116 3180
-
(1994)
J. Am. Chem. Soc.
, vol.116
, pp. 3180
-
-
Cygler, M.1
Grochulski, P.2
Kazlauskas, R.J.3
Schrag, J.D.4
Bouthillier, F.5
Rubin, B.6
Serreqi, A.N.7
Gupta, A.K.8
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34249990348
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The CD and absorption spectra of all the copolymers in THF did not change after the samples had been allowed to stand at room temperature for 1 day For recent reviews, see ref 4 and
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The CD and absorption spectra of all the copolymers in THF did not change after the samples had been allowed to stand at room temperature for 1 day
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39
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33745037692
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The significant difference between the CD spectrum of the sum of the homopolymers of poly((S)- 1) and poly((R)- 2) (1: 2 = 53: 47, mol/mol) and the CD spectrum of the copolymer (poly((S)- 1-co-(R)- 2)) (1: 2 = 53: 47, mol/mol) (Fig. S4A) indicates that the poly((S)- 1-co-(R)- 2)) is not composed of the blocks of poly((S)- 1) and poly((R)- 2). A similar great difference between the CD spectrum of poly((S)- 3-co-(R)- 2) and the sum of the CD spectra of the corresponding homopolymers, poly((S)- 3) and poly((R)- 2) (Fig. S4B), also supports the random monomer distributions in the poly((S)- 3-co-(R)- 2). These results clearly revealed the inversion of the helix-sense of the poly((S)- 1-co-(R)- 2) main-chain that takes place after the chemical modification of the hydroxy groups with bulky substituents The different temperature-dependent ICD intensity changes observed for the copolymers (Fig. 2B) may be determined by cooperative interactions with neighboring monomer units;
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K. Maeda H. Mochizuki M. Watanabe E. Yashima J. Am. Chem. Soc. 2006 128 7639
-
(2006)
J. Am. Chem. Soc.
, vol.128
, pp. 7639
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Maeda, K.1
Mochizuki, H.2
Watanabe, M.3
Yashima, E.4
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