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a) A. Togni, L. M. Venanzi, Angew. Chem. 1994, 106, 517; Angew. Chem. Int. Ed. Engl. 1994, 33, 497;
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a) A. Togni, L. M. Venanzi, Angew. Chem. 1994, 106, 517; Angew. Chem. Int. Ed. Engl. 1994, 33, 497;
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7
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0344912805
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These compounds may be regarded as analogues of 1,3-diketone-type ligands of various transition metals. They may form complexes with metal ions and have been used in the preparation of ligands capable of extracting ammonium compounds from aqueous to organic phases. See: A. H. Alberts, K. Timmer, J. G. Noltes, A. L. Spek, J. Am. Chem. Soc. 1979, 101, 3375.
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Alberts, A.H.1
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g) T. Calogeropoulou, G. B. Hammond, D. F. Wiemer, J. Org. Chem. 1987, 52, 4185;
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Calogeropoulou, T.1
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17
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84984213371
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and references therein
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i) D. Hellwinkel, R. Lenz, Chem. Ber. 1985, 118, 66 and references therein.
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a) T. S. Lobana in The Chemistry of Organophosphorus Compounds, Vol. 2 (Ed.: F.R. Hartley), Wiley, New York, 1992, pp. 409-566;
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Lobana, T.S.1
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0002675911
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Ed.: F. R. Hartley, John Wiley, New York
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c) H. B. Kagan, M. Sasaki in The Chemistry of Organophosphorus Compounds, (Ed.: F. R. Hartley), John Wiley, New York, 1990, pp. 51-102.
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Auner, N.1
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25
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2642679441
-
-
note
-
3 in the five-membered ring with respect to the extracyclic aryl group. If they are on the same side of the five-membered phosphorus-containing ring, we call it a syn isomer, otherwise it is an anti isomer.
-
-
-
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26
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0000183594
-
-
The structure of the major diastereomer has been established by comparison with the results obtained by Inch et al. in the stereo-specific synthesis of optically active 1,3,2-oxazaphospholidine-2-one derived from (-)-ephedrine and the fact that these corresponding acid chlorides undergo substitution with phenoxide anions with retention of configuration at the phosphorus atom. See: D. B. Cooper, C. R. Hall, J. M. Harrison, T. D. Inch, J. Chem. Soc. Perkin Trans. I 1977, 1969.
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J. Chem. Soc. Perkin Trans.
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Cooper, D.B.1
Hall, C.R.2
Harrison, J.M.3
Inch, T.D.4
-
27
-
-
2642670478
-
-
note
-
3): δ = 12.9 (s), 27.5 (s), 111.9 (d, J = 4.6 Hz), 115.4 (s), 119.3 (s), 120.1 (d, J = 4.4 Hz), 124.6 (s), 128.0 (d, J = 8.7 Hz, 2C), 128.3 (d, J = 4.8 Hz, 2C), 129.3 (d, J = 14.3 Hz, 2C), 134.1 (d, J = 4.3 Hz), 146.1 (d, J = 9.4 Hz), 150.7 (d, J = 7.1 Hz).
-
-
-
-
28
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0000166427
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-
Hitherto, the only reported method for the preparation of such compounds consisted of an exchange reaction between bis(dimethylamino)o-anisyl phosphine and a chiral auxiliary, followed by oxidation with rBuOOH. Subsequent demethylation led exclusively to diastereomer anti-3e with retention of the configuration on the phosphorus. The syn diastereomer could not be obtained owing to the highly unstable intermediate compound which totally epimerizes at the phosphorus atom to produce the thermodynamic anti diastereomer. See: a) P. Cros, G. Buono, G. Peiffer, D. Denis, A. Mortreux, F. Petit, New. J. Chem. 1987, 11, 573;
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Cros, P.1
Buono, G.2
Peiffer, G.3
Denis, D.4
Mortreux, A.5
Petit, F.6
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29
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0003030829
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b) H. Arzoumanian, G. Buono, M'B. Choukrad, J. F. Petrignani, Organometallics 1988, 7, 59;
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Arzoumanian, H.1
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Petrignani, J.F.4
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30
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0031568645
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c) J. M. Brunel, O. Chiodi, B. Faure, F. Fotiadu, G. Buono, J. Organomet. Chem. 1997, 529, 285.
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Brunel, J.M.1
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31
-
-
2642704411
-
-
note
-
1 from the systemic absences. A total of 3540 reflections were collected at T = 294 K. The standards were measured after every 120 reflections. Among the first 200 pairs of reflections, the signs of the corresponding calculated differences established that the molecule is described with the correct absolute configuration S. Crystallographic data (excluding structure factors) for the structures reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-101014. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB21EZ, UK (fax: (+44) 1223-336-033; e-mail: deposit@ccdc.cam.ac.uk).
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32
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0030457354
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6-oxathietanes. See: T. Kawashima, F. Ohno, R. Okazaki, H. Ikeda, S. Inugaki, J. Am. Chem. Soc. 1996, 118, 12455.
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Kawashima, T.1
Ohno, F.2
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Ikeda, H.4
Inugaki, S.5
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33
-
-
23044505158
-
-
Ed.: D. Betheil, Academic Press, New York
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As a result of the stability of some pentacoordinate square pyramidal (SP) phosphorus species, it is also possible to consider mechanistic pathways proceeding via SP intermediates with the four-membered oxaphosphetane ring and the five-membered diazaphospholane ring in basal positions and the oxygen anion group in an axial position. The stereochemistry of the migration derives from a cis basal interaction of the entering/leaving group. See also: G. R. J. Thatcher, R. Kluger in Mechanism and Catalysis of Nucleophilic Substitution in Phosphate Esters in Advances in Physical Organic Chemistry, Vol. 25 (Ed.: D. Betheil), Academic Press, New York, 1989, pp. 99-265.
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Thatcher, G.R.J.1
Kluger, R.2
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36
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-
0001848341
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Such phosphetane intermediates have played an important role in the elucidation of the factors that influence the stereochemistry of the Wittig reaction. See: a) B. E. Maryanoff, A. B. Reitz, Chem. Rev. 1989, 89, 863;
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Chem. Rev.
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Maryanoff, B.E.1
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b) E. Vedejs, C. F. Marth, R. Ruggieri, J. Am. Chem. Soc. 1988, 110, 3940;
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Vedejs, E.1
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39
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33845374697
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d) B. E. Maryanoff, A. B. Reitz, M. S. Mutter, R. R. Inners, H. R. Almond, Jr., R. R. Whittle, R. A. Olofson, J. Am. Chem. Soc. 1986, 108, 7664;
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Maryanoff, B.E.1
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Almond Jr., H.R.5
Whittle, R.R.6
Olofson, R.A.7
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33845375469
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e) A. B. Reitz, S. O. Nortey, A. D. Jordan, Jr., M. S. Mutter, B. E. Maryanoff, J. Org. Chem. 1986, 51, 3302;
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Reitz, A.B.1
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41
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f) H. J. Bestmann, K. Roth, E. Wilhelm, R. Böhme, H. Burzlaff, Angew. Chem. 1979, 91, 945; Angew. Chem. Int. Ed. Engl. 1979, 18, 876;
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Bestmann, H.J.1
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84985561665
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f) H. J. Bestmann, K. Roth, E. Wilhelm, R. Böhme, H. Burzlaff, Angew. Chem. 1979, 91, 945; Angew. Chem. Int. Ed. Engl. 1979, 18, 876;
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43
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84980191503
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g) D. Hellwinkel, W. Krapp, ibid. 1974, 86, 524 and 1974, 13, 540.
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Hellwinkel, D.1
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45
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0008736197
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Recently, the synthesis of isolable 1,2-oxaphosphetanes has been achieved and X-ray crystallographic analysis have been performed to determine the structure of such compounds. See: a) T. Kawashima, K. Kato, R. Okazaki, Angew. Chem. 1993, 105, 941; Angew. Chem. Int. Ed. Engl. 1993, 32, 869; b) T. Kawashima, K. Kato, R. Okazaki, J. Am. Chem. Soc. 1992, 114, 4008.
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46
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33748216592
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Recently, the synthesis of isolable 1,2-oxaphosphetanes has been achieved and X-ray crystallographic analysis have been performed to determine the structure of such compounds. See: a) T. Kawashima, K. Kato, R. Okazaki, Angew. Chem. 1993, 105, 941; Angew. Chem. Int. Ed. Engl. 1993, 32, 869; b) T. Kawashima, K. Kato, R. Okazaki, J. Am. Chem. Soc. 1992, 114, 4008.
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47
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84992432032
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Recently, the synthesis of isolable 1,2-oxaphosphetanes has been achieved and X-ray crystallographic analysis have been performed to determine the structure of such compounds. See: a) T. Kawashima, K. Kato, R. Okazaki, Angew. Chem. 1993, 105, 941; Angew. Chem. Int. Ed. Engl. 1993, 32, 869; b) T. Kawashima, K. Kato, R. Okazaki, J. Am. Chem. Soc. 1992, 114, 4008.
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ACS Monograph 176, American Chemical Society, Washington, D.C.
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Nevertheless, in any case turnstile rotation must be taken into consideration as a mechanistic alternative. See: a) P. Gillespie, P. Hoffmann, H. Klusacek, D. Marquarding, S. Pfohl, F. Ramirez, E. A. Tsolis, I. Ugi, Angew. Chem. 1971, 83, 691; Angew. Chem. Int. Ed. Engl. 1971, 10, 687;
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Nevertheless, in any case turnstile rotation must be taken into consideration as a mechanistic alternative. See: a) P. Gillespie, P. Hoffmann, H. Klusacek, D. Marquarding, S. Pfohl, F. Ramirez, E. A. Tsolis, I. Ugi, Angew. Chem. 1971, 83, 691; Angew. Chem. Int. Ed. Engl. 1971, 10, 687;
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59
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0042990375
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Previous investigations have been carried out on the sterochemical behavior of the four-membered oxyphosphoranes (1,2-oxaphosphetanes) which have three P-C bonds. See: a) F. Ramirez, J. F. Pilot, O. P. Madan, C. P. Smith, J. Am. Chem. Soc. 1968, 90, 1275; b) F. Ramirez, C. P. Smith, J. F. Pilot, ibid. 1968, 90, 6726; c) D. B. Denney, D. Z. Denney, C. D. Hall, K. L. Marsi, ibid. 1972, 94, 245; d) See also ref. [23] for a recent and pertinent study of the spiro-oxaphosphetane pseudorotation.
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Ramirez, F.1
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60
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0000477519
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Previous investigations have been carried out on the sterochemical behavior of the four-membered oxyphosphoranes (1,2-oxaphosphetanes) which have three P-C bonds. See: a) F. Ramirez, J. F. Pilot, O. P. Madan, C. P. Smith, J. Am. Chem. Soc. 1968, 90, 1275; b) F. Ramirez, C. P. Smith, J. F. Pilot, ibid. 1968, 90, 6726; c) D. B. Denney, D. Z. Denney, C. D. Hall, K. L. Marsi, ibid. 1972, 94, 245; d) See also ref. [23] for a recent and pertinent study of the spiro-oxaphosphetane pseudorotation.
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Ramirez, F.1
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0011739919
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Previous investigations have been carried out on the sterochemical behavior of the four-membered oxyphosphoranes (1,2-oxaphosphetanes) which have three P-C bonds. See: a) F. Ramirez, J. F. Pilot, O. P. Madan, C. P. Smith, J. Am. Chem. Soc. 1968, 90, 1275; b) F. Ramirez, C. P. Smith, J. F. Pilot, ibid. 1968, 90, 6726; c) D. B. Denney, D. Z. Denney, C. D. Hall, K. L. Marsi, ibid. 1972, 94, 245; d) See also ref. [23] for a recent and pertinent study of the spiro-oxaphosphetane pseudorotation.
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See also ref. [23] for a recent and pertinent study of the spiro-oxaphosphetane pseudorotation
-
Previous investigations have been carried out on the sterochemical behavior of the four-membered oxyphosphoranes (1,2-oxaphosphetanes) which have three P-C bonds. See: a) F. Ramirez, J. F. Pilot, O. P. Madan, C. P. Smith, J. Am. Chem. Soc. 1968, 90, 1275; b) F. Ramirez, C. P. Smith, J. F. Pilot, ibid. 1968, 90, 6726; c) D. B. Denney, D. Z. Denney, C. D. Hall, K. L. Marsi, ibid. 1972, 94, 245; d) See also ref. [23] for a recent and pertinent study of the spiro-oxaphosphetane pseudorotation.
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-1). See: a) R. R. Holmes, J. Am. Chem. Soc. 1978, 100, 433; b) ref. [24], Table 1.7-1.9, pp. 35-89.
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-
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65
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2642651261
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note
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[36] have been shown to be efficient chiral catalysts in various enantioselective reactions.
-
-
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66
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0029764219
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For recent examples see: a) S. E. Denmark, S. B. D. Winter, X. Su, K. Wong, J. Am. Chem. Soc. 1996, 118, 7404; b) K. Iseki, Y. Kuroki, M. Takahashi, Y. Kobayashi, Tetrahedron Lett. 1996, 37, 5149.
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For recent examples see: a) S. E. Denmark, S. B. D. Winter, X. Su, K. Wong, J. Am. Chem. Soc. 1996, 118, 7404; b) K. Iseki, Y. Kuroki, M. Takahashi, Y. Kobayashi, Tetrahedron Lett. 1996, 37, 5149.
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