메뉴 건너뛰기




Volumn 72, Issue 11, 2007, Pages 4149-4155

A practical synthesis of a γ-secretase inhibitor

Author keywords

[No Author keywords available]

Indexed keywords

ACRYLONITRILE DERIVATIVES; CYCLOHEXANONE DERIVATIVE; SCALEABLE SYNTHESIS; SECRETASE INHIBITOR;

EID: 34249779845     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo070407n     Document Type: Article
Times cited : (31)

References (59)
  • 22
    • 34249805551 scopus 로고    scopus 로고
    • Yields reported are of isolated materials corrected for purity as determined by reversed-phase HPLC assay versus authentic standards
    • Yields reported are of isolated materials corrected for purity as determined by reversed-phase HPLC assay versus authentic standards.
  • 25
    • 34249784671 scopus 로고    scopus 로고
    • Sulfone 7 can also be prepared in >90% yield by alkylation of 2,5-difluorobenzylbromide with 4-chlorobenzenesulfinic acid sodium salt in DMF; however, this salt is not commercially available on kilogram scale.
    • Sulfone 7 can also be prepared in >90% yield by alkylation of 2,5-difluorobenzylbromide with 4-chlorobenzenesulfinic acid sodium salt in DMF; however, this salt is not commercially available on kilogram scale.
  • 26
    • 34249827711 scopus 로고    scopus 로고
    • Conditions: (a) LiHMDS
    • 2)l;
    • 2)l
  • 31
    • 0032482080 scopus 로고    scopus 로고
    • For a recent review of the Mannich reaction: Arend, M.; Westermann, B.; Risch, N. Angew. Chem., Int. Ed. 1998, 37, 1044.
    • (c) For a recent review of the Mannich reaction: Arend, M.; Westermann, B.; Risch, N. Angew. Chem., Int. Ed. 1998, 37, 1044.
  • 32
    • 34249808047 scopus 로고    scopus 로고
    • Crystallographic data for this compound have been deposited at the Cambridge Crystallographic Data Centre. These data can be obtained free of charge via, by emailing data_ request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223 336033, a CCDC 236716
    • Crystallographic data for this compound have been deposited at the Cambridge Crystallographic Data Centre. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data-request/cif, by emailing data_ request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223 336033. (a) CCDC 236716.
  • 33
    • 34249824410 scopus 로고    scopus 로고
    • CCDC 236717
    • (b) CCDC 236717.
  • 41
    • 34249798581 scopus 로고    scopus 로고
    • Hydrogenations with catalysts derived from rhodium or iridium did not indicate any reversal in substrate control, yielding 12 as the major product in each case examined
    • Hydrogenations with catalysts derived from rhodium or iridium did not indicate any reversal in substrate control, yielding 12 as the major product in each case examined.
  • 42
    • 0000676432 scopus 로고    scopus 로고
    • 2(cymene) complexes were prepared according to the literature: Mashima, K.; Kusano, K.; Sate, N.; Matsumura, N.; Nozaki, K.; Kumobayashi, H.; Sayo, N.; Hori, Y.; Ishizaki, T.; Akutagawa, S.; Takaya, H. J. Org. Chem. 1994, 59, 3064.
    • 2(cymene) complexes were prepared according to the literature: Mashima, K.; Kusano, K.; Sate, N.; Matsumura, N.; Nozaki, K.; Kumobayashi, H.; Sayo, N.; Hori, Y.; Ishizaki, T.; Akutagawa, S.; Takaya, H. J. Org. Chem. 1994, 59, 3064.
  • 43
    • 34249784071 scopus 로고    scopus 로고
    • The regiochemistry in the transition states for ruthenium hydride addition to 2 are likely to be identical, but have been assigned arbitrarily pending further mechanistic experimentation.
    • The regiochemistry in the transition states for ruthenium hydride addition to 2 are likely to be identical, but have been assigned arbitrarily pending further mechanistic experimentation.
  • 46
    • 33645781012 scopus 로고    scopus 로고
    • For the application of this conformational bias in an intramolecular nitrile oxide-olefin cycloaddition, see: Scott, J. P, Oliver, S. F, Brands, K. J. M, Brewer, S. E, Daves, A. J, Gibb, A. D, Hands, D, Keen, S. P, Sheen, F. J, Reamer, R. A, Wilson, R. D, Dolling, U. H. J. Org. Chem. 2006, 71, 3086
    • (b) For the application of this conformational bias in an intramolecular nitrile oxide-olefin cycloaddition, see: Scott, J. P.; Oliver, S. F.; Brands, K. J. M.; Brewer, S. E.; Daves, A. J.; Gibb, A. D.; Hands, D.; Keen, S. P.; Sheen, F. J.; Reamer, R. A.; Wilson, R. D.; Dolling, U. H. J. Org. Chem. 2006, 71, 3086.
  • 48
    • 34249812218 scopus 로고    scopus 로고
    • Diastereoselection was determined by reversed-phase HPLC analysis
    • (a) Diastereoselection was determined by reversed-phase HPLC analysis,
  • 49
    • 34249801357 scopus 로고    scopus 로고
    • 4 reduction of 4 afforded a 67:33 trans/cis mixture from which the trans isomer could be separated chromatographically.
    • 4 reduction of 4 afforded a 67:33 trans/cis mixture from which the trans isomer could be separated chromatographically.
  • 50
    • 34249810777 scopus 로고    scopus 로고
    • 13C NMR studies that indicated the presence of two sets of four quaternary carbon signals and isolated AB proton quartets consistent with methylenes adjacent to the nitrile functions.
    • 13C NMR studies that indicated the presence of two sets of four quaternary carbon signals and isolated AB proton quartets consistent with methylenes adjacent to the nitrile functions.
  • 58
    • 37049095886 scopus 로고    scopus 로고
    • Incomplete conversion of aldehyde 16, likely due to competing enolization, was observed with methoxymethyldiphenyl phosphine oxide under a variety of conditions: Earnshaw, C.; Wallis, C. J.; Warren, S. J. Chem. Soc., Chem. Commun. 1977, 314.
    • Incomplete conversion of aldehyde 16, likely due to competing enolization, was observed with methoxymethyldiphenyl phosphine oxide under a variety of conditions: Earnshaw, C.; Wallis, C. J.; Warren, S. J. Chem. Soc., Chem. Commun. 1977, 314.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.