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1. See, e.g., reviews: (a) Gordon, E. M.; Barrett, R. W.; Dower, W. J.; Fodor, S. P. A.; Gallop, M. A. J. Med. Chem. 1994, 37, 1385;
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Gordon, E.M.1
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(f) Hermkens, P. P. H.; Ottenheijm, H. C. J.; Rees, D. Tetrahedron. 1996, 52, 4527;
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Hermkens, P.P.H.1
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Rees, D.3
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9
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33644994354
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The topic has been recently reviewed in ref.
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2. For an early account, see: (a) Crowley, J. I.; Rapoport, H. Acc. Chem. Res. 1976, 9, 135. The topic has been recently reviewed in ref.
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Crowley, J.I.1
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3. Atuegbu, A.; Maclean, D.; Nguyen, C.; Gordon, E. M.; Jacobs, J. W. Bioorg. Med. Chem. 1996, 4, 1097.
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Atuegbu, A.1
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12
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17744405184
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4. Nicolaou, K. C.; Winssinger, N.; Pastor, J.; Ninkovic, S.; Sarabia, F.; He, Y.; Vourloumis, D.; Yang, Z.; Li, T.; Giannakakou, P.; Hamel, E. Nature (London). 1997, 387, 268.
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Nicolaou, K.C.1
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He, Y.6
Vourloumis, D.7
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7. De Amici, M.; De Micheli, C. D.; Cateni, F.; Carrea, G.; Ottolina, G. Tetrahedron: Asymmetry. 1993, 4, 1073.
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De Amici, M.1
De Micheli, C.D.2
Cateni, F.3
Carrea, G.4
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0010410952
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8. (a) Strominger, J. L.; Threnn, R. H.; Scott, S.S. J. Am. Chem. Soc. 1959, 81, 3803;
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Strominger, J.L.1
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Scott, S.S.3
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19
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0003963058
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John Wiley & Sons
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(d) Gale, I. F.; Cuncliffe, E.; Reynolds, P. E.; Richmond, M. H.; Waring, M. J. In: The Molecular Basis of Antibiotic Action. John Wiley & Sons, 1981, p.65.
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Gale, I.F.1
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20
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0023136452
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9. Nozaki, Y.; Katayama, N.; Ono, H.; Tsubotani, S.; Harada, S.; Okazaki, H.; Nakao, Y. Nature (London), 1987, 325, 179; Critical Rev. Biotech. 1992, 12, 225.
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Nozaki, Y.1
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Okazaki, H.6
Nakao, Y.7
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21
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0027007999
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9. Nozaki, Y.; Katayama, N.; Ono, H.; Tsubotani, S.; Harada, S.; Okazaki, H.; Nakao, Y. Nature (London), 1987, 325, 179; Critical Rev. Biotech. 1992, 12, 225.
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22
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0024491605
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10. Nozaki, Y.; Katayama, N.; Harada, S.; Ono, H.; Okazaki, H. J. Antibiot. (Tokyo), 1989, 42, 84.
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23
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85038541511
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note
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11. SciFinder search in CAS data base (1965 - present) has produced ca. 171 and 4246 hits for topics "synthesis of cycloserines" and "synthesis of β-lactams", respectively.
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24
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85038543365
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note
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12. Herein, we employ the terms "a scaffold decoration" and "a total synthesis" to describe two different combichem strategies. In the former, the key scaffold building block is produced in solution, immobilized, and then derivatized on a solid phase. In the second approach, the scaffold itself is constructed via SPS starting from an appropriate immobilized precursor reagent.
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25
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0001130337
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Notably, the authors also described a solution phase N-tritylation of the D-cycloserine ortho-salicylimine
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13. Payne, R. A.; Stammer, C. H. J. Org. Chem. 1968, 33, 2421. Notably, the authors also described a solution phase N-tritylation of the D-cycloserine ortho-salicylimine.
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J. Org. Chem.
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, pp. 2421
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Payne, R.A.1
Stammer, C.H.2
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26
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0023632085
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14. Baldwin, J. E.; Ng, S. C.; Pratt, A. J. Tetrahedron Lett. 1987, 28, 4319.
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Tetrahedron Lett.
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Baldwin, J.E.1
Ng, S.C.2
Pratt, A.J.3
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27
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85038538979
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note
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15. Attempts to employ several other amine protection groups, such as benzaldimine and ortho-salicylimine functionalities were less satisfactory.
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28
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45549111520
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16. Polystyrene-based 2-methoxy-4-alkoxybenzyl alcohol resin: Mergler, M.; Tanner, R.; Gosteli, J.; Grogg, P. Terahedron Lett. 1988, 29, 4005.
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Terahedron Lett.
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Mergler, M.1
Tanner, R.2
Gosteli, J.3
Grogg, P.4
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30
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85038551880
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note
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20 have been well documented, no Mitsunobu-type transformation of cycloserine derivatives has been reported.
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32
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0023632085
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(b) Baldwin, J. E.; Ng, S. C.; Pratt, A. J. Tetrahedron Lett. 1987, 28, 4319.
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(1987)
Tetrahedron Lett.
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Baldwin, J.E.1
Ng, S.C.2
Pratt, A.J.3
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35
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0023391680
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16 with that for acidolytically more stable PAL amide analogs derived from 2,6-dimethoxy-4-alkoxybenzylamine resin: Albericio, F.; Barany, G. Int. Pept. Protein Res. 1987, 30, 206.
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Int. Pept. Protein Res.
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Albericio, F.1
Barany, G.2
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36
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0000677561
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23. A preference for certain types of polymeric supports in specific chemical transformations is well documented: see, e.g. (a) Gordeev, M. F.; Patel, D. V.; Gordon, E. M. J. Org. Chem. 1997, 62, 8177;
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J. Org. Chem.
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Gordeev, M.F.1
Patel, D.V.2
Gordon, E.M.3
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38
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0031562439
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Absolute configuration for the two diastereomers 23 was not determined
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2O resonances (AB part of the ABX cycloserine system), whereas a single multiplet for the α-proton of D-Ala fragment observed (δ 5.57 ppm). Interestingly, little or no racemization has been detected in a similar base-mediated heterocyclization with a dipeptidic analog of the urea 22: Gordeev, M. F.; Hui. H. C.; Gordon, E. M.; Patel, D. V. Tetrahedron Lett. 1997, 38, 1729. Absolute configuration for the two diastereomers 23 was not determined.
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(1997)
Tetrahedron Lett.
, vol.38
, pp. 1729
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Gordeev, M.F.1
Hui, H.C.2
Gordon, E.M.3
Patel, D.V.4
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