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Volumn 11, Issue 20, 2009, Pages 4516-4519

Second generation synthesis of C27 - C35 Building block of E7389, a synthetic halichondrin analogue

Author keywords

[No Author keywords available]

Indexed keywords

2 (3 AMINO 2 HYDROXYPROPYL)HEXACOSAHYDRO 3 METHOXY 26 METHYL 20,27 BIS(METHYLENE)11,15 18,21 24,28 TRIEPOXY 7,9 ETHANO 12,15 METHANO 9H,15H FURO(3,2 I)FURO(2',3' 5,6)PYRANO(4,3 B)(1,4)DIOXACYCLOPENTACOSIN 5 (4H) ONE; 2-(3-AMINO-2-HYDROXYPROPYL)HEXACOSAHYDRO-3-METHOXY-26-METHYL-20,27-BIS(METHYLENE)11,15-18,21-24,28-TRIEPOXY-7,9-ETHANO-12,15-METHANO-9H,15H-FURO(3,2-I)FURO(2',3'-5,6)PYRANO(4,3-B)(1,4)DIOXACYCLOPENTACOSIN-5-(4H)-ONE; ANTINEOPLASTIC AGENT; CARBON; ETHER DERIVATIVE; FURAN DERIVATIVE; HALICHONDRIN B; KETONE; LACTONE;

EID: 70349913892     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol9016589     Document Type: Article
Times cited : (29)

References (44)
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    • For isolation of the halichondrins from different species of sponges
    • (b) Hirata, Y.: Uemura, D. Pure Appl. Chem. 1986, 58, 701. For isolation of the halichondrins from different species of sponges,
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    • and references cited therein.
    • (h) Chen, C.-L.; Namba, K.; Kishi, Y. Org. Lett. 2009, 11, 409, and references cited therein.
    • (2009) Org. Lett. , vol.11 , pp. 409
    • Chen, C.-L.1    Namba, K.2    Kishi, Y.3
  • 16
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    • For synthetic work by Salomon. Burke. Yonemitsu. and Phillips, see: (a) Kim, S.; Salomon, R. G. Tetrahedron Lett. 1989, 30. 6279.
    • (1989) Tetrahedron Lett. , vol.30 , pp. 6279
    • Kim, S.1    Salomon, R.G.2
  • 27
    • 84975897156 scopus 로고    scopus 로고
    • Cragg, G. M., Kingston, D. G. I., Newman, D. J., Eds.; CRC Press: Boca Raton, FL
    • (c) Yu, M. J.; Kishi, Y.; Littlefield, B. A. In Anticancer Agents from Natural Products; Cragg, G. M., Kingston, D. G. I., Newman, D. J., Eds.; CRC Press: Boca Raton, FL, 2005: pp 241-265.
    • (2005) Anticancer Agents from Natural Products , pp. 241-265
    • Yu, M.J.1    Kishi, Y.2    Littlefield, B.A.3
  • 28
    • 70349914110 scopus 로고    scopus 로고
    • E7389 website
    • (d) E7389 website: http:// www.dmgs.com/nda/e7389-080201.html.
  • 29
    • 70349906681 scopus 로고    scopus 로고
    • One of the research focuses has been the development and application of catalytic asymmetric Cr-mediated coupling reactions. Recent results on this subject will be reported in separate papers.
    • One of the research focuses has been the development and application of catalytic asymmetric Cr-mediated coupling reactions. Recent results on this subject will be reported in separate papers.
  • 31
    • 70349904638 scopus 로고    scopus 로고
    • 2PYR.
    • 2PYR.
  • 32
  • 38
    • 70349931566 scopus 로고    scopus 로고
    • 4/NMO (22% overall yield from 3).
    • 4/NMO (22% overall yield from 3).
  • 39
    • 70349902671 scopus 로고    scopus 로고
    • In the new synthesis, the overall yield of 3 →13 was 45%, whereas that of 3 → the intermediate synthetically equivalent to 13 was 13% in the previous synthesis. The over three-time improvement in overall yield is primarily attributed to (1) higher overall yield from 3 to 11. (2) elimination of the benzylation (90%)/debenzylation (75%) steps, and (3) higher efficiency of the hydroxyl-directed reduction (vide infra).
    • In the new synthesis, the overall yield of 3 →13 was 45%, whereas that of 3 → the intermediate synthetically equivalent to 13 was 13% in the previous synthesis. The over three-time improvement in overall yield is primarily attributed to (1) higher overall yield from 3 to 11. (2) elimination of the benzylation (90%)/debenzylation (75%) steps, and (3) higher efficiency of the hydroxyl-directed reduction (vide infra).
  • 40
    • 70349906661 scopus 로고    scopus 로고
    • 3 in the previous synthesis, whereas both (Z)- and (E)-α,βunsaturated phenylsulfones were smoothly reduced in the new synthesis (vide infra).
    • 3 in the previous synthesis, whereas both (Z)- and (E)-α,βunsaturated phenylsulfones were smoothly reduced in the new synthesis (vide infra).
  • 44
    • 70349907861 scopus 로고    scopus 로고
    • In the previous syntheses, we used 14 and 16 as the C27-C35 building block. However, our recent studies demonstrate that 13 is an ideal C27-C35 building block (ref 6).
    • In the previous syntheses, we used 14 and 16 as the C27-C35 building block. However, our recent studies demonstrate that 13 is an ideal C27-C35 building block (ref 6).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.