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0027160610
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0029876822
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For nonenzymatic enantioselective acylation catalysts, see: (a) Vedejs, E.; Chen, X. J. Am. Chem. Soc. 1996, 118, 1809-1810.
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0032564916
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(g) Miller, S. J.; Copeland, G. T.; Papaioannou, N.; Horstmann, T. E.; Ruel, E. M. J. Am. Chem. Soc. 1998, 120, 1629-1630.
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(h) Ruble, J. C.; Tweddell, J.; Fu, G. C. J Org. Chem. 1998, 63, 2794-2795.
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(i) Copeland, G. T.; Jarvo, E. R.; Miller, S. J. J. Org. Chem. 1998, 63, 6784-6785.
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erratum, see p 10276
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(j) Garrett, C. E.; Fu, G. C. J. Am. Chem. Soc. 1998, 120, 7479-7483 (erratum, see p 10276).
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erratum, see p 10452
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(k) Tao, B.; Ruble, J. C.; Hoic, D. A.; Fu, G. C. J. Am. Chem. Soc. 1999, 121, 5091-5092 (erratum, see p 10452).
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(a) Liang, J.; Ruble, C.; Fu, G. C. J. Org. Chem. 1998, 63, 3154-3155.
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0032569913
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(a) Spivey, A. C.; Fekner, T.; Adams, H. Tetrahedron Lett. 1998, 39, 8919-8922.
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27
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0002244727
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-
For leading references on DMAP and its congeners, see: (a) Litvinenko, L. M.; Kirichenko, A. I. Dokl. Chem. (Engl. Transl.) 1967, 763-766 [Dokl. Akad. Nauk. SSSR 1967, 176, 97-100].
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(b) Steglich, W.; Höfle, G. Angew. Chem., Int. Ed. Engl. 1969, 8, 981.
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Steglich, W.1
Höfle, G.2
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0001557720
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(c) Hassner, A.; Krepski, L. R.; Alexanian, V. Tetrahedron 1978, 34, 2069-2076.
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Tetrahedron
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Hassner, A.1
Krepski, L.R.2
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0017998510
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(d) Höfle, G.; Steglich, W.; Vorbruggen, H., Angew. Chem., Int. Ed. Engl. 1978, 17, 569-583.
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Höfle, G.1
Steglich, W.2
Vorbruggen, H.3
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34
-
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0343869088
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-
unpublished results. See also refs 5a,b
-
Spivey, A. C.; Maddaford, A., unpublished results. See also refs 5a,b.
-
-
-
Spivey, A.C.1
Maddaford, A.2
-
35
-
-
0342563440
-
-
note
-
s = (rate constant of fast-reacting enantiomer)/(rate constant of slow-reacting enantiomer).
-
-
-
-
36
-
-
0006983979
-
-
Cambridge Soft Corp.: U.S.
-
Computer program: CS Chem3D Pro, version 4.0; Cambridge Soft Corp.: U.S., 1997.
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(1997)
CS Chem3D Pro, Version 4.0
-
-
-
38
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1942483938
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Du, C.-J., F.; Hart, H.; Ng, K.-K., D. J. Org. Chem. 1986, 51, 3162-3165.
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Du, C.-J.F.1
Hart, H.2
Ng, K.-K.D.3
-
39
-
-
0343869086
-
-
note
-
Comparative atropisomerization kinetic studies for 3-aryl analogues of amine 1 and DMAP (ref 7b) indicated that biaryl 15 would be configurationally sufficiently stable at room temperature, enabling its optical resolution and convenient use in enantiopure form without any risk of racemization.
-
-
-
-
42
-
-
84947151032
-
-
Miyaura, N.; Yanogi, T.; Suzuki, A. Synth. Commun. 1981, 11, 513-519.
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Miyaura, N.1
Yanogi, T.2
Suzuki, A.3
-
43
-
-
0343869085
-
-
note
-
3 instead of NaOH as base gives the 5-bromo derivative of biaryl 12 in a 30% yield. Further functionalization of the 5-position can open access to a variety of novel catalyst candidates. Suzuki cross-coupling of aryl dibromide 11 with sterically less demanding arylboronic acids (i.e., 1-naphthalene-or 3-methoxybenzeneboronic acid) affords the products of bis-coupling in high yield (74% and 97%, respectively).
-
-
-
-
46
-
-
0343433362
-
-
note
-
1 = Me], were not sufficiently soluble at -78° C for CKR to be carried out.
-
-
-
-
47
-
-
28844436100
-
-
For KR of partially enriched compounds and "double" KR, see: (a) Horeau, A. Tetrahedron 1975, 31, 1307-1309.
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(1975)
Tetrahedron
, vol.31
, pp. 1307-1309
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Horeau, A.1
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48
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0004079121
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(b) Brandt, J.; Jochum, C.; Ugi, I.; Jochum, P. Tetrahedron 1977, 33, 1353-1363.
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(1977)
Tetrahedron
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Brandt, J.1
Jochum, C.2
Ugi, I.3
Jochum, P.4
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49
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0025866683
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(c) Brown, S. M.; Davies, S. G.; deSousa, J. A. A. Tetrahedron: Asymmetry 1991, 2, 511-514.
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Brown, S.M.1
Davies, S.G.2
DeSousa, J.A.A.3
-
50
-
-
0342997720
-
-
note
-
2O as acyl donor.
-
-
-
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