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Volumn 69, Issue 2, 2004, Pages 357-373

MetAP-2 Inhibitors Based on the Fumagillin Structure. Side-Chain Modification and Ring-Substituted Analogues

Author keywords

[No Author keywords available]

Indexed keywords

MOLECULAR STRUCTURE; SYNTHESIS (CHEMICAL);

EID: 0347763342     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo035065+     Document Type: Article
Times cited : (53)

References (39)
  • 2
    • 0030806436 scopus 로고    scopus 로고
    • For reviews on the clinical potential of antiangiogenic agents, see: (a) Norrby, K. APMIS 1997, 105, 417-437.
    • (1997) APMIS , vol.105 , pp. 417-437
    • Norrby, K.1
  • 19
    • 0346560027 scopus 로고    scopus 로고
    • note
    • The validity of this approach has already been demonstrated in a preliminary communication (ref 5f).
  • 22
    • 0029838280 scopus 로고    scopus 로고
    • Although aldehyde 12 is a 7.7: 1 mixture of (R) and (S) enantiomers, we could isolate only one aldol product, after deselenylation. This unexpected result has also been observed in the course of our fumagillol synthesis (see ref 5f) as well as with other similar condensations using aldehyde 12 and oxazolidinones bearing branched, β,γ-unsaturated acyl groups (unpublished results). A possible explanation is that of preferential condensation of these oxazolidinones with (S)-12 possibly due to "matched" double-asymmetric induction, whereas reaction with (R)-12 would be kinetically strongly disfavoured. Although we are not aware of literature reports fully supporting our tentative explanation, a related behavior of oxazolidinone boron enolates was described: Sibi, M. P.; Lu, J.; Talbacka, C. L. J. Org. Chem. 1996, 61, 7848-7855. In this report, however, the differences in yields were not as marked as in the present work.
    • (1996) J. Org. Chem. , vol.61 , pp. 7848-7855
    • Sibi, M.P.1    Lu, J.2    Talbacka, C.L.3
  • 25
    • 0345928924 scopus 로고    scopus 로고
    • note
    • In related side chain-modified fumagillin analogues, epoxidation always occurs on the re-re face of the 1′,2′ olefinic double bond to afford the (1′R,2′R) epoxide in large excess. See refs 4, 5a, 5b.
  • 26
    • 0347820313 scopus 로고    scopus 로고
    • note
    • 50 were determined by incubating the enzyme and its substrate (following the experimental conditions described above) with increasing concentrations of inhibitor.
  • 33
    • 0347190041 scopus 로고    scopus 로고
    • note
    • Attempted epoxidation of alcohol 33 led to the exclusive formation of a cyclopropyl ketone as observed earlier. Facile intramolecular deprotonation by the alcoolate derived from OH-6 followed by β-elimination of the methoxy group may explain this result. During this work, this type of β-elimination constantly constituted a potential problem which required particular attention.
  • 35
    • 0346560024 scopus 로고    scopus 로고
    • note
    • The alternative TBHP/triton B method led to erratic results (yields ranging from 25% to 75%) the major problem being the oxidation of the PMB group to the corresponding p-methoxybenzoate.
  • 36
    • 0030851937 scopus 로고    scopus 로고
    • On the basis of literature precedents, the epoxide function was expected to be located trans to the OPMB group: Barros, M. T.; Maycock, C. D.; Ventura, M. R. J. Org. Chem. 1997, 62, 3984-3988.
    • (1997) J. Org. Chem. , vol.62 , pp. 3984-3988
    • Barros, M.T.1    Maycock, C.D.2    Ventura, M.R.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.