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Volumn 128, Issue 40, 2006, Pages 13290-13297

Modular catalysts for diene cycloisomerization: Rapid and enantioselective variants for bicyclopropane synthesis

Author keywords

[No Author keywords available]

Indexed keywords

ENANTIOSELECTIVE; PRECATALYSTS; TRIPHOS; X-RAY STRUCTURES;

EID: 33749509028     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja064335d     Document Type: Article
Times cited : (77)

References (89)
  • 14
    • 0037692311 scopus 로고    scopus 로고
    • For reviews focusing on the mechanisms of cycloisomerization, see: (a) Lloyd-Jones, G. C. Org. Biomol. Chem. 2003, 1, 215-236.
    • (2003) Org. Biomol. Chem. , vol.1 , pp. 215-236
    • Lloyd-Jones, G.C.1
  • 28
    • 33646576245 scopus 로고    scopus 로고
    • For additional examples of Pt(II)-catalyzed alkene activation reactions, see: (a) Fürstner, A.; Aïssa, C. J. Am. Chem. Soc. 2006, 128, 6306-6307.
    • (2006) J. Am. Chem. Soc. , vol.128 , pp. 6306-6307
    • Fürstner, A.1    Aïssa, C.2
  • 35
    • 0142201207 scopus 로고
    • For early work on metal-induced carbenium ion formation, see: Chisolm, M. H.; Clark, H. C. Acc. Chem. Res. 1973, 6, 202-209.
    • (1973) Acc. Chem. Res. , vol.6 , pp. 202-209
    • Chisolm, M.H.1    Clark, H.C.2
  • 45
    • 0001546711 scopus 로고
    • Trost, B. M., Ed.; Pergamon Press: Elmsford, NY
    • (a) Hegedus, L. S. In Comprehensive Organic Synthesis; Trost, B. M., Ed.; Pergamon Press: Elmsford, NY, 1991; Vol. 4, pp 551-569.
    • (1991) Comprehensive Organic Synthesis , vol.4 , pp. 551-569
    • Hegedus, L.S.1
  • 46
    • 0000012312 scopus 로고
    • Morrison, J. D., Ed.; Academic Press: New York
    • (b) Bartlett, P. A. In Asymmetric Synthesis; Morrison, J. D., Ed.; Academic Press: New York, 1984; Vol. 3, pp 411-454.
    • (1984) Asymmetric Synthesis , vol.3 , pp. 411-454
    • Bartlett, P.A.1
  • 50
    • 0001140189 scopus 로고
    • Trost, B. M., Ed.; Pergamon Press: Elmsford, NY
    • (b) Sutherland, J. K. In Comprehensive Organic Synthesis; Trost, B. M., Ed.; Pergamon Press: Elmsford, NY, 1991; Vol. 1, pp 341-377.
    • (1991) Comprehensive Organic Synthesis , vol.1 , pp. 341-377
    • Sutherland, J.K.1
  • 51
    • 0001418150 scopus 로고
    • Morrison, J. D., Ed.; Academic Press: New York
    • (c) Bartlett, P. A. In Asymmetric Synthesis; Morrison, J. D., Ed.; Academic Press: New York, 1984; Vol. 3, pp 341-409.
    • (1984) Asymmetric Synthesis , vol.3 , pp. 341-409
    • Bartlett, P.A.1
  • 52
    • 0004199544 scopus 로고
    • Porter, J. W., Spurgeon, S. L., Eds.; John Wiley & Sons: New York
    • Biosynthesis of Isoprenoid Compounds; Porter, J. W., Spurgeon, S. L., Eds.; John Wiley & Sons: New York, 1981; Vol. 1.
    • (1981) Biosynthesis of Isoprenoid Compounds , vol.1
  • 53
  • 55
    • 33645688330 scopus 로고    scopus 로고
    • For a discussion explicitly comparing Pt- and Au-catalyzed enyne cycloisomerization to terpene biosynthesis, see: Fürstner, A.; Hannen, P. Chem.-Eur. J. 2006, 12, 3006-3019.
    • (2006) Chem.-Eur. J. , vol.12 , pp. 3006-3019
    • Fürstner, A.1    Hannen, P.2
  • 56
    • 9644295973 scopus 로고    scopus 로고
    • (a) Hahn, C. Chem.-Eur. J. 2004, 10, 5888-5899.
    • (2004) Chem.-Eur. J. , vol.10 , pp. 5888-5899
    • Hahn, C.1
  • 64
    • 33749536347 scopus 로고    scopus 로고
    • note
    • For recent examples of chiral Pd(II), Pt(II), and Au(I) catalysts in related electrophilic activation processes, see ref 6.
  • 66
    • 0142082555 scopus 로고
    • 2O at -78 °C was sufficiently pure for use, see: Parrett, F. W.; Sun, M. S. J. Chem. Educ. 1977, 54, 448-449.
    • (1977) J. Chem. Educ. , vol.54 , pp. 448-449
    • Parrett, F.W.1    Sun, M.S.2
  • 70
    • 33749534238 scopus 로고    scopus 로고
    • note
    • +-impregnated silica gel.
  • 71
    • 33749530632 scopus 로고    scopus 로고
    • note
    • 2-alkene adduct is observed (see ref 9).
  • 74
    • 33749518826 scopus 로고    scopus 로고
    • note
    • In several instances, we have identified the isomerization products, and found them to include the following: (Diagram Presented)
  • 75
    • 33749530168 scopus 로고    scopus 로고
    • note
    • 2 and pentane at -26 °C.
  • 76
    • 33749507150 scopus 로고    scopus 로고
    • note
    • The pathways differ only in the timing of ring construction, cyclohexyl followed by pinching to the 5-3 in the 6-endo pathway, or beginning with the cyclopentane (5-exo path) and annulating the cyclopropane in step 2.
  • 77
    • 33749529243 scopus 로고    scopus 로고
    • note
    • The biosynthetic pathway to the thujanes goes via a conceptually related 6-endo pathway; see ref 19b.
  • 79
    • 33749523698 scopus 로고    scopus 로고
    • note
    • P-P is 20 Hz, cf. ∼200 Hz for a trans coupling), that is, a PPN ligand array.
  • 81
    • 33749524747 scopus 로고    scopus 로고
    • note
    • 3 addition displaces the nitrogen from the metal. Catalysts derived from this ligand do not form cyclopropane products.
  • 82
    • 33749533383 scopus 로고    scopus 로고
    • note
    • The Josiphos and Walphos ligands in the Solvias ligand kit were also screened and found to not provide any cyclopropane products.
  • 83
    • 33749533549 scopus 로고    scopus 로고
    • note
    • Yields at higher concentrations were compromised by the formation of tetrasubstituted alkene (see ref 33). This was especially problematic for 2.
  • 84
    • 33749519319 scopus 로고    scopus 로고
    • note
    • Because the absolute stereochemistry of 2 was assigned by analogy to 20, we caution against any overinterpretation of the absolute assignment.
  • 87
    • 33749532782 scopus 로고    scopus 로고
    • note
    • We note that each of the substrates in Table 5 gives -ve rotations (MeOH, 546 nm), except for 2 which gives a +ve rotation.
  • 88
    • 33749525966 scopus 로고    scopus 로고
    • note
    • A change in priority due to N and branching inverts the Cahn-Ingold-Prelog designators.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.