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Volumn 28, Issue 39, 1987, Pages 4569-4572

A stereoselective total synthesis of (9S)-9-dihydroerythronolide A from D-glucose

Author keywords

[No Author keywords available]

Indexed keywords

DRUG STRUCTURE; DRUG SYNTHESIS; NONHUMAN; THEORETICAL STUDY;

EID: 0023259304     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(00)96566-3     Document Type: Article
Times cited : (68)

References (42)
  • 11
    • 84918463604 scopus 로고    scopus 로고
    • T. Nakata, M. Fukui, and T. Oishi, to be published.
  • 12
    • 84918463603 scopus 로고    scopus 로고
    • Recently we reported highly stereoselective synthesis of macrolide aglycons such as methynolide, pikronolide, and tylonolide.
  • 16
    • 84918463602 scopus 로고    scopus 로고
    • 3 was already converted to 1 and 2.
  • 17
    • 84918463601 scopus 로고    scopus 로고
    • Unless otherwise noted, the numberings are based on that of 3.
  • 18
    • 37049092702 scopus 로고
    • Chiral synthesis of polyketide-derived natural products. Part 4. Synthesis of a left-hand segment with six consecutive chiral centres of dihydroerythronolide A for the total synthesis of erythromycin A from D-glucose
    • and alternative synthesis of 6 from propionaldehyde will be reported soon.
    • (1985) Journal of the Chemical Society, Perkin Transactions 1 , pp. 7
    • Oikawa1    Nishi2    Yonemitsu3
  • 22
    • 84918463600 scopus 로고    scopus 로고
    • 4 in ether, etc.) gave only poor results.
  • 27
    • 84918463599 scopus 로고    scopus 로고
    • Protection of 9,11-diol, not of 11,12-diol, as a cyclic acetal is extremely important for the macrolactonization.
  • 30
    • 84918463598 scopus 로고    scopus 로고
    • 4 is a 1 : 1 stereoisomeric mixture with regard to the SO position.
  • 31
    • 37049093660 scopus 로고
    • Chiral synthesis of polyketide-derived natural products. Part 5. Synthesis of a chiral segment corresponding to the C-1?C-5 unit of erythromycin A from D-glucose
    • and an alternative synthesis of 13 from methallyl alcohol via the Sharpless asymmetric epoxidation will be reported soon.
    • (1985) Journal of the Chemical Society, Perkin Transactions 1 , pp. 19
    • Oikawa1    Nishi2    Yonemitsu3
  • 33
    • 84918463597 scopus 로고    scopus 로고
    • Corey's method (NBS, 2,6-lutidine, 80% MeCN, rt) also gave 5 in 71% yield.
  • 35
    • 84918463596 scopus 로고    scopus 로고
    • Most of excess 4 was recovered (86%). Coupling between 4 and the 6-methylketone derived from 5 gave only poor results in <20% yield.
  • 36
    • 84918463595 scopus 로고    scopus 로고
    • 2, in THF, no reaction occurred.
  • 40
    • 84918463594 scopus 로고    scopus 로고
    • In this macrolactonization, concentration of DMAP was very important. Yields of 19 in various concentrations of DMAP are as follws [final mM of DMAP (% yield of 19)]: 25 mM (27%); 9.5 mM (14%); 6 mM (13%); 3 mM (0%).
  • 41
    • 84918463593 scopus 로고    scopus 로고
    • As pointed out by Stork, an axial methyl group of 9,11-acetonide protection hindered this lactonizition. Actually we, could not obtain 19 by the modified Corey method, and also 20 gave only a trace of lactonization product, which was, however, obtained in 63% yield by highly reactive Yamaguchi's method at high concentration of DMAP.
  • 42
    • 84918463592 scopus 로고    scopus 로고
    • 3, 18, 19, and a 6-O-MM derivative of 21 were identical with the respective authentic samples derived from natural erythromycin A in terms of IR, NMR, and MS spectra.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.