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Volumn 18, Issue 2, 2008, Pages 808-811

A novel bicyclic hexapeptide, RA-XVIII, from Rubia cordifolia: Structure, semi-synthesis, and cytotoxicity

Author keywords

Cytotoxicity; Deoxybouvardin; RA XVIII; Rubia cordifolia; Synthesis

Indexed keywords

DEOXYBOUVARDIN; HEXAPEPTIDE; PEPTIDE RA XVIII; UNCLASSIFIED DRUG;

EID: 38149097713     PISSN: 0960894X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.bmcl.2007.11.030     Document Type: Article
Times cited : (35)

References (12)
  • 8
    • 38149096146 scopus 로고    scopus 로고
    • note
    • -1: 3297, 2926, 1660, 1635, 1513, 1259, 1094, 1034.
  • 11
    • 38149088690 scopus 로고    scopus 로고
    • note
    • The location of the nitro group in the resulting nitration reaction product is apparently controlled by the nature of the substituent at the ζ position of Tyr-6. In 2, the hydroxyl group at ζ having a strong electron-donating effect causes the nitro group to be introduced to εa to produce an ortho-nitrated compound, 4, whereas, in the case of 1, the methoxyl group at ζ sterically inhibits the introduction of a nitro group to the corresponding position, so that the nitro group is introduced to the less-hindered δa position, which is also activated by the diphenyl ether oxygen, and the nitration product is 8.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.