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(
3
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(
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4
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(
6
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(13) The MBH reaction using supported proline has also been
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(14) TentaGel S-NH (0.26 mmol/g amine loading, purchased
2
(
from Fluka, product number: 86364) was used as a PEG-PS
resin. Supported proline was prepared by the standard solid-
phase peptide synthesis (ref. 7).
(
c) Akagawa, K.; Yamashita, T.; Sakamoto, S.; Kudo, K.
(15) The acceleration of MBH reactions by the addition of water
has been described in several reports, see: (a) Goren, K.;
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Sakamoto, S.; Kudo, K. Org. Lett. 2008, 10, 2035.
(
f) Akagawa, K.; Sakamoto, S.; Kudo, K. Tetrahedron Lett.
005, 46, 8185.
8) Akagawa, K.; Sakamoto, S.; Kudo, K. Tetrahedron Lett.
007, 48, 985.
2
(
(
2
9) For recent reviews of supported catalysts, see: (a) Lu, J.;
Toy, P. H. Chem. Rev. 2009, 109, 815. (b) Minakata, S.;
Komatsu, M. Chem. Rev. 2009, 109, 711. (c) Akiyama, R.;
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(16) TentaGel S-NH (0.45 mmol/g amine loading, purchased
2
from Fluka, product number: 86359) was used for
supporting proline.
418. (g) Fraile, J. M.; García, J. I.; Mayoral, J. A. Chem. Rev.
Synlett 2011, No. 6, 817–820 © Thieme Stuttgart · New York