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Volumn , Issue 30, 2007, Pages 5064-5070

An efficient synthesis of (-)-posticlure: The sex pheromone of Orgyia postica

Author keywords

Asymmetric synthesis; Diethyl L tartrate; Epoxides; Orgyia postica; Pheromones

Indexed keywords


EID: 35548984925     PISSN: 1434193X     EISSN: 10990690     Source Type: Journal    
DOI: 10.1002/ejoc.200700449     Document Type: Article
Times cited : (20)

References (20)
  • 3
    • 35549012137 scopus 로고    scopus 로고
    • For an excellent classification of pheromones, see: a
    • For an excellent classification of pheromones, see: a) http://www.nysaes.cornell.edu/pheronet;
  • 4
    • 35548998964 scopus 로고    scopus 로고
    • In February 2004 a new pherolist was created by Peter Witzgall, Tobias Lindblom, Marie Bengtsson and Miklós Tóth
    • b) In February 2004 a new pherolist was created by Peter Witzgall, Tobias Lindblom, Marie Bengtsson and Miklós Tóth: http://www-pherolist. slu.se/pherolist.php.
  • 7
    • 0026495369 scopus 로고
    • For a one-pot vicinal-diol-to-epoxide conversion, see
    • For a one-pot vicinal-diol-to-epoxide conversion, see: H. C. Kolb, K. B. Sharpless, Tetrahedron 1992, 48, 10515-10528.
    • (1992) Tetrahedron , vol.48 , pp. 10515-10528
    • Kolb, H.C.1    Sharpless, K.B.2
  • 8
    • 35548997244 scopus 로고    scopus 로고
    • If diethyl L-tartrate is protected as a cyclic orthoacetate and carried forward (7 → 5 → 2, route A) then compound 2 can be converted directly into 1. However, by acetonide protection (7 → 6 → 3, route B), the conversion of compound 3 into 1 has to proceed via the orthoacetate 2, which is the intermediate in the diol-to-epoxide conversion. This means one extra step of acetonide deprotection. Similarly the conversion of 7 into 4 proceeds via compound 6.
    • If diethyl L-tartrate is protected as a cyclic orthoacetate and carried forward (7 → 5 → 2, route A) then compound 2 can be converted directly into 1. However, by acetonide protection (7 → 6 → 3, route B), the conversion of compound 3 into 1 has to proceed via the orthoacetate 2, which is the intermediate in the diol-to-epoxide conversion. This means one extra step of acetonide deprotection. Similarly the conversion of 7 into 4 proceeds via compound 6.
  • 10
    • 0021873440 scopus 로고    scopus 로고
    • 4, see: K. C. Nicolaou, D. P. Papahatjis, D. A. Claremon, R. L. Magolda, R. E. Dolle, J. Org. Chem. 1985, 50, 1440-1456.
    • 4, see: K. C. Nicolaou, D. P. Papahatjis, D. A. Claremon, R. L. Magolda, R. E. Dolle, J. Org. Chem. 1985, 50, 1440-1456.
  • 12
    • 0028929730 scopus 로고    scopus 로고
    • 3).
    • 3).
  • 13
    • 84985052469 scopus 로고    scopus 로고
    • 3) in b) E. Hungerbuhler, D. Seebach, Helv. Chim. Acta 1981, 64, 687-702.
    • 3) in b) E. Hungerbuhler, D. Seebach, Helv. Chim. Acta 1981, 64, 687-702.
  • 14
    • 0742304332 scopus 로고    scopus 로고
    • The diol 12 was treated with trimethyl orthoacetate and catalytic p-TsOH in dry CH2Cl2 at 0°C After complete consumption of the starting material (TLC, 1.5 h) a fast-moving spot was detected on a TLC sheet which we believed could be cyclic orthoacetate 5. Also a polar spot corresponding to 13 and 14 was noticed. After aqueous work-up and column chromatography 13 and 14 were isolated as a mixture. The integration of the allylic proton (C-3) and also the acetyl (CH3) group indicated that 13 and 14 were present in a 1:3 ratio. However, we did not investigate which is the major isomer. Even avoiding aqueous work-up, that is, quenching the reaction with solid NaHCO 3, filtration, concentration and column chromatography, afforded the mixture in the same ratio. For a similar conversion of vicinal diols to monoacetoxy products using trimethyl orthoacetate, see: M. Ikejiri, K. Miyashit
    • 3, filtration, concentration and column chromatography, afforded the mixture in the same ratio. For a similar conversion of vicinal diols to monoacetoxy products using trimethyl orthoacetate, see: M. Ikejiri, K. Miyashita, T. Tsunemi, T. Imanishi, Tetrahedron Lett. 2004, 45, 1243-1246.
  • 15
    • 35549004279 scopus 로고    scopus 로고
    • If the cyclic orthoacetate was stable to multistep reactions we could save one step in the synthetic strategy, that is, route A vs. route B see Scheme 1
    • If the cyclic orthoacetate was stable to multistep reactions we could save one step in the synthetic strategy, that is, route A vs. route B (see Scheme 1).
  • 16
    • 35548990811 scopus 로고    scopus 로고
    • The intermediates are shown below. The cyclic orthoacetate is formed as exemplified by this conversion, though probably it is not stable to isolation, Chemical Equation Presented
    • The intermediates are shown below. The cyclic orthoacetate is formed as exemplified by this conversion, though probably it is not stable to isolation. (Chemical Equation Presented)
  • 17
    • 0034731635 scopus 로고    scopus 로고
    • For an example of debenzylation with Pearlman's catalyst in the presence of an epoxide, see
    • For an example of debenzylation with Pearlman's catalyst in the presence of an epoxide, see: D.-G. Liu, B. Wang, G.-Q. Lin, J. Org. Chem. 2000, 65, 9114-9119.
    • (2000) J. Org. Chem , vol.65 , pp. 9114-9119
    • Liu, D.-G.1    Wang, B.2    Lin, G.-Q.3
  • 19
    • 35548945565 scopus 로고    scopus 로고
    • The optical rotation value for this compound did not match with that reported in ref.[4
    • [4]
  • 20
    • 35548989937 scopus 로고    scopus 로고
    • Individual peaks are assigned in analogy with ref.[5
    • [5]


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.