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Volumn 122, Issue 20, 2000, Pages 4982-4983

Total synthesis of (-)-cylindrocyclophane a via a double Horner-Emmons macrocyclic dimerization event [2]

Author keywords

[No Author keywords available]

Indexed keywords

CYLINDROCYCLOPHANE A; PARACYCLOPHANE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 0034709454     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja000429q     Document Type: Letter
Times cited : (50)

References (26)
  • 6
    • 0342793586 scopus 로고    scopus 로고
    • note
    • (c) For a summary of naturally occurring phanes, see Chapter 11 in ref 2b.
  • 8
    • 0343228139 scopus 로고    scopus 로고
    • note
    • (b) A synthesis of cylindrocyclophane A from the Smith laboratory is described in the accompanying contribution.
  • 10
    • 0003545608 scopus 로고    scopus 로고
    • Orlando, FL, August paper ORGN 173
    • Successful relevant macrocyclic dimerization reactions were reported (a) Hoye, T. R., Humpal, P. E. Presented at the 212th National Meeting of the American Chemical Society, Orlando, FL, August 1996; paper ORGN 173. (b) Humpal, P. E. Ph.D. Thesis, University of Minnesota, 1996.
    • (1996) 212th National Meeting of the American Chemical Society
    • Hoye, T.R.1    Humpal, P.E.2
  • 11
    • 0343663769 scopus 로고    scopus 로고
    • Ph.D. Thesis, University of Minnesota
    • Successful relevant macrocyclic dimerization reactions were reported (a) Hoye, T. R., Humpal, P. E. Presented at the 212th National Meeting of the American Chemical Society, Orlando, FL, August 1996; paper ORGN 173. (b) Humpal, P. E. Ph.D. Thesis, University of Minnesota, 1996.
    • (1996)
    • Humpal, P.E.1
  • 13
    • 0342793584 scopus 로고    scopus 로고
    • note
    • 1H NMR analysis of the corresponding Mosher esters. Mosher ester formation from 9 itself was complicated by both partial racemization and elimination, indicative of facile ionizalion to an allylic carbocation.
  • 16
    • 0343228137 scopus 로고    scopus 로고
    • note
    • 1H NMR analysis of the sec-phenethyl ester 12 and confirmed at the stage of primary alcohol 13 by analysis of its Mosher ester. The absolute configuration of the new benzylic stereocenter was assumed to be R based upon a chair-transition state for the Claisen rearrangement.
  • 19
    • 0343228134 scopus 로고    scopus 로고
    • note
    • 6 or of (ii) DBU and LiCl in D3CC≡N. The intermolecular olefination proceeded smoothly, but there was no observable change in the isomeric integrity of ZZ-24, even after each mixture was incubated for 27 h. It is therefore unlikely that the diene-dienoates 24 (or, we presume, 25) are equilibrating under either of these sets of Horner-Emmons olefination conditions. The mixture of dienoate isomers appears result from a kinetically rather than thermodynamically controlled event.
  • 22
    • 0342793581 scopus 로고    scopus 로고
    • note
    • (b) Nonacidic workup was required ai this step to avoid isomerization of the alkenes.
  • 24
    • 0001123407 scopus 로고
    • (a) Mechoulam, R.; Gaoni, Y. J. Am. Chem. Soc. 1965, 87, 3273, wherein reference is made to the earlier unpublished use and recommendation of this method for cleavage of dimethyl resorcinols by Professor G. Ourisson.
    • (1965) J. Am. Chem. Soc. , vol.87 , pp. 3273
    • Mechoulam, R.1    Gaoni, Y.2
  • 25
    • 0343228132 scopus 로고
    • Müller, E., Ed.; George Thieme Verlag: Stuttgart
    • (b) Meerwein, H. Houben-Weyl, Methoden der Organische Chemie; Müller, E., Ed.; George Thieme Verlag: Stuttgart, 1964; Vol. VI, pp 160-164.
    • (1964) Houben-Weyl, Methoden der Organische Chemie , vol.6 , pp. 160-164
    • Meerwein, H.1
  • 26
    • 0342793579 scopus 로고    scopus 로고
    • note
    • 3/EtSH, conditions that were not successful in the case of conversion of 29 to 1A.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.