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Volumn , Issue 6, 2004, Pages 1244-1253

Total synthesis without protection: Three-step synthesis of optically active clavicipitic acids by a biomimetic route

Author keywords

Clavicipitic acids; Heck reaction; Protecting groups; Total synthesis; Tryptophan

Indexed keywords

2 METHYL 3 BUTEN 2 OL; 4 BROMOINDOLE; 4 BROMOTRYPTOPHAN; 4 VINYLTRYPTOPHAN; CLAVICIPITIC ACID DERIVATIVE; DEXTRO SERINE; ERGOT ALKALOID; INDOLE DERIVATIVE; METHYL GROUP; PALLADIUM; TRYPTOPHAN DERIVATIVE; UNCLASSIFIED DRUG; WATER;

EID: 4544248742     PISSN: 1434193X     EISSN: None     Source Type: Journal    
DOI: 10.1002/ejoc.200300603     Document Type: Article
Times cited : (77)

References (45)
  • 6
    • 4544249105 scopus 로고    scopus 로고
    • note
    • Although we have reported that the reaction of 4-bromoindole (7) with N-acetyldehydroalanine (11) did not proceed, reexamination of this experiment showed that in fact, the reaction gave N-acetyl-4-bromotryptophan (12b); see ref. [2].
  • 8
    • 4544235600 scopus 로고    scopus 로고
    • note
    • Pure acid dl-12b was obtained after chromatography with neutralized silica gel (hexane/EtOAc, 1:2) in 71% yield (see Exp. Sect.).
  • 20
    • 0001394248 scopus 로고
    • Clavicipitic acids were isolated as an isomeric mixture, and the melting point of the mixture has been reported: C.-W. Robbers, H. Otsuka, H. G. Floss, J. Org. Chem. 1980, 45, 1117-1121.
    • (1980) J. Org. Chem. , vol.45 , pp. 1117-1121
    • Robbers, C.-W.1    Otsuka, H.2    Floss, H.G.3
  • 35
    • 4544347942 scopus 로고    scopus 로고
    • note
    • Snyder also proposed the same intermediate 24, see ref.[5]
  • 38
    • 0000097237 scopus 로고    scopus 로고
    • chapter 6 (Ed.: P. A. Grieco), Blackie Academic and Professional, London
    • Comprehensive review of the Heck reaction in aqueous media; I. P. Beletskaya, A. V. Cheprakow, chapter 6, in: Organic synthesis in Water (Ed.: P. A. Grieco), Blackie Academic and Professional, London, 1998; pp. 141-213.
    • (1998) Organic Synthesis in Water , pp. 141-213
    • Beletskaya, I.P.1    Cheprakow, A.V.2
  • 42
    • 4544288570 scopus 로고    scopus 로고
    • note
    • N2′ mechanism, but rather via π-allyl-palladium complex 25 (Scheme 8).
  • 44
    • 0021708567 scopus 로고
    • Somei and Yamada reported the synthesis of dl-6,7-secoagroclavine and dl-aurantioclavine without using any protective groups. [29a] M. Somei, F. Yamada, Chem. Pharm. Bull. 1984, 32, 5064-5065.
    • (1984) Chem. Pharm. Bull. , vol.32 , pp. 5064-5065
    • Somei, M.1    Yamada, F.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.