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5
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0342699706
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For reviews of applications of the Burgess Reagent in synthesis see: a
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For reviews of applications of the Burgess Reagent in synthesis see: a) S. Burckhardt, Synlett 2000, 559;
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Burckhardt, S.1
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7
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Ed, L. A. Paquette, Wiley, Chichester
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U. Rinner, D. R. Adams, M. L. dos Santos, K. A. Abboud, T. Hudlicky, Synlett 2003, 1247-1252.
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24
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66449109631
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-
[2b]) published in 2000: The compatibility of the Burgess reagent with many functionalities, e.g. halogens, epoxides, alkenes, alkynes, aldehydes, ketones, acetals, esters, secondary amides, makes it an attractive technique for the introduction of C-C double bonds into highly functionalized molecules.
-
[2b]) published in 2000: "The compatibility of the Burgess reagent with many functionalities, e.g. halogens, epoxides, alkenes, alkynes, aldehydes, ketones, acetals, esters, secondary amides, makes it an attractive technique for the introduction of C-C double bonds into highly functionalized molecules. ""
-
-
-
-
25
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0019955658
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-
Cyclic epoxides proximal to alcohols react with the Burgess reagent to form sulfamidates (ref. 14). Distally located epoxides appear inert provided excess reagent is not used. See A. A. Nagel, J DiBrino, L. A. Vincent, J A. Retsema, J. Med. Chem. 1982, 25, 881-884. It was likely this report that led to the belief in inertness of epoxides.
-
Cyclic epoxides proximal to alcohols react with the Burgess reagent to form sulfamidates (ref. 14). Distally located epoxides appear inert provided excess reagent is not used. See A. A. Nagel, J DiBrino, L. A. Vincent, J A. Retsema, J. Med. Chem. 1982, 25, 881-884. It was likely this report that led to the belief in inertness of epoxides.
-
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26
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84944037533
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For reviews on the synthesis and utility of 1,2-amino alcohols see: a, Eds, A. R. Katritzky, C. W. Rees, E. F. V. Scriven, Pergamon,New York
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For reviews on the synthesis and utility of 1,2-amino alcohols see: a) G. Shaw, in Comprhensive Heterocyclic Chemistry II (Eds.: A. R. Katritzky, C. W. Rees, E. F. V. Scriven), Pergamon,New York, 1996, pp. 397;
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Shaw, G.1
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66449133175
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For reviews on synthesis and reaction of cyclic sulfates see: a B. B. Lohray, Synthesis 1992, 1035-1.052;
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For reviews on synthesis and reaction of cyclic sulfates see: a) B. B. Lohray, Synthesis 1992, 1035-1.052;
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66449115434
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[141]).
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66449136855
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[14]).
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45
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66449111253
-
-
To the best of our knowledge, as of this report, there have been no previous computational studies addressing the Burgess reagent's reactivity.
-
To the best of our knowledge, as of this report, there have been no previous computational studies addressing the Burgess reagent's reactivity.
-
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47
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0345491105
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b) C. Lee, W. Yang, R. G. Parr, Phys. Rev. B 1988, 37, 785-789.
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33645949559
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d. M. M. Francl, W. J Pietro, W.J. Hehre, J. S. Binkley, M. S. Gordon, D. J DeFrees, J. A. Pople, J. Chem. Phys. 1982, 77, 3654-3665;
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d.) M. M. Francl, W. J Pietro, W.J. Hehre, J. S. Binkley, M. S. Gordon, D. J DeFrees, J. A. Pople, J. Chem. Phys. 1982, 77, 3654-3665;
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52
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e) V. A. Rassolov, J. A. Pople, M. A. Rainer, T. L. Windus, J. Chem. Phys. 1998, 709, 1223-1229.
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-
53
-
-
66449132752
-
-
For additional details regarding the procedural, details associated with these PES scans, see SI
-
For additional details regarding the procedural, details associated with these PES scans, see SI.
-
-
-
-
54
-
-
66449102337
-
-
M. J Frisch, G. W. Trucks, H. B. Schlegel, G. E. Scuseria, M. A. Robb, J R. Cheeseman, J A. Montgomery Jr, T. Vreven, K. N. Kudin, J. C. Burant, J M. Millam, S. S. Iyengar, J. Tomasi, V. Barone, B. Mennucci, M. Cossi, G. Scalmani, N. Rega, G. A. Petersson, H. Nakatsuji, M. Hada, M. Eliara, K. Toyota, R. Fukuda, J. Hasegawa, M. Ishida, T. Nakajima, Y. Honda, O. Kitao, H. Nakai, M. Klene, X. Li, J E. Knox, H. P. Hratchian, J. B. Cross, C. Adamo, J. Jaramillo, R. Gomperts, R. E. Stratmann, O. Yazyev, A. J Austin, R. Cammi, C. Pomelli, J. W. Ochterski, P. Y. Ayala, K. Morokuma, G. A. Voth, P. Salvador, J. J. Dannenberg, V. G. Zakrzewski, S. Dapprich, A. D. Daniels, M. C. Strain, O. Parkas, D. K. Malick, A. D. Rabuck, K. Raghavachari, J B. Foresman, J V. Ortiz, Q. Cui, A. G. Baboul, S. Clifford, J Cioslowski, B. B. Stefanov, G. Liu, A. Liashenko, P. Piskorz, I. Komaromi, R. L. Martin, D. J Fox, T. Keith, M. A. Al-Laham, C. Y. Peng, A. Nanayakkara, M. Challacombe, P. M. W. Gill, B. Johnson
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M. J Frisch, G. W. Trucks, H. B. Schlegel, G. E. Scuseria, M. A. Robb, J R. Cheeseman, J A. Montgomery Jr., T. Vreven, K. N. Kudin, J. C. Burant, J M. Millam, S. S. Iyengar, J. Tomasi, V. Barone, B. Mennucci, M. Cossi, G. Scalmani, N. Rega, G. A. Petersson, H. Nakatsuji, M. Hada, M. Eliara, K. Toyota, R. Fukuda, J. Hasegawa, M. Ishida, T. Nakajima, Y. Honda, O. Kitao, H. Nakai, M. Klene, X. Li, J E. Knox, H. P. Hratchian, J. B. Cross, C. Adamo, J. Jaramillo, R. Gomperts, R. E. Stratmann, O. Yazyev, A. J Austin, R. Cammi, C. Pomelli, J. W. Ochterski, P. Y. Ayala, K. Morokuma, G. A. Voth, P. Salvador, J. J. Dannenberg, V. G. Zakrzewski, S. Dapprich, A. D. Daniels, M. C. Strain, O. Parkas, D. K. Malick, A. D. Rabuck, K. Raghavachari, J B. Foresman, J V. Ortiz, Q. Cui, A. G. Baboul, S. Clifford, J Cioslowski, B. B. Stefanov, G. Liu, A. Liashenko, P. Piskorz, I. Komaromi, R. L. Martin, D. J Fox, T. Keith, M. A. Al-Laham, C. Y. Peng, A. Nanayakkara, M. Challacombe, P. M. W. Gill, B. Johnson, W. Chen, M. W. Wong, C. Gonzalez, J. A. Pople, Gaussian 03, revision C.02, Gaussian, Inc., Wallingford CT, 2004.
-
-
-
-
55
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66449088773
-
-
See Supporting Information for calculated transition states. Owing to their higher activation barrier subsequent steps along this pathway were not considered
-
See Supporting Information for calculated transition states. Owing to their higher activation barrier subsequent steps along this pathway were not considered.
-
-
-
-
56
-
-
66449136201
-
-
Although even this reaction barrier is slightly too high, it was by far the lowest out of all the mechanistic possibilities considered
-
Although even this reaction barrier is slightly too high, it was by far the lowest out of all the mechanistic possibilities considered.
-
-
-
-
57
-
-
0004157499
-
-
Ed, R. F. W Bader, Oxford. Press, As implemented within the AIM program
-
Atoms in Molecules: A Quantum Theory (Ed.: R. F. W Bader), Oxford. Press, 1990. As implemented within the AIM program, 2000.
-
(1990)
Atoms in Molecules: A Quantum Theory
-
-
-
58
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66449101363
-
-
E. D. Glendening, A. E. Reed, J. E. Carpenter, F. Weinhold, NBO, version 3.1
-
E. D. Glendening, A. E. Reed, J. E. Carpenter, F. Weinhold, NBO, version 3.1.
-
-
-
-
60
-
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66449129743
-
-
Wiberg bond indices for pertinent bond forming/breaking distances during 5-mem-TSl: C-N: 0.1588, C...O: 0.3007, and O....S: 0.4358.
-
b) Wiberg bond indices for pertinent bond forming/breaking distances during 5-mem-TSl: C-N: 0.1588, C...O: 0.3007, and O....S: 0.4358.
-
-
-
-
61
-
-
66449092750
-
-
An Intrinsic Reaction Coordinate (IRC) calculation confirmed that cis-5-mem sulfamidate was the immediate product of 5-mem-TSl.
-
An Intrinsic Reaction Coordinate (IRC) calculation confirmed that cis-5-mem sulfamidate was the immediate product of 5-mem-TSl.
-
-
-
-
62
-
-
66449135874
-
-
See Supporting Information for details regarding these searches
-
See Supporting Information for details regarding these searches.
-
-
-
-
63
-
-
66449127301
-
-
Multiple attempts were made to locate 5-mem-TSl in the presence of an epoxide bound Lewis acid, none of these attempts were successful in locating energetically feasible transition states.
-
Multiple attempts were made to locate 5-mem-TSl in the presence of an epoxide bound Lewis acid, none of these attempts were successful in locating energetically feasible transition states.
-
-
-
-
64
-
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66449099934
-
-
For example a. reaction dynamic involving Brønsted acidic trimethylanimonium (a likely degradation product of Burgess reagent) was computed, and shown to have a reduced barrier to cyclohexene oxide ring opening as compared with that of the uncatalyzed processes (i.e. 5-mem-TSl).
-
For example a. reaction dynamic involving Brønsted acidic trimethylanimonium (a likely degradation product of Burgess reagent) was computed, and shown to have a reduced barrier to cyclohexene oxide ring opening as compared with that of the uncatalyzed processes (i.e. 5-mem-TSl).
-
-
-
|