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Volumn 63, Issue 51, 2007, Pages 12769-12778

A study into asymmetric Nicholas cyclisation reactions

Author keywords

[No Author keywords available]

Indexed keywords

ALCOHOL DERIVATIVE; BENZOPYRAN DERIVATIVE; CITRONELLAL; SALICYLALDEHYDE;

EID: 35748980292     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2007.09.077     Document Type: Article
Times cited : (12)

References (47)
  • 5
    • 0037140714 scopus 로고    scopus 로고
    • Reviewed by: and
    • Reviewed by:. Teobald B.J. Tetrahedron 58 (2002) 4133-4170 and
    • (2002) Tetrahedron , vol.58 , pp. 4133-4170
    • Teobald, B.J.1
  • 21
    • 0034635481 scopus 로고    scopus 로고
    • Reviewed by:
    • Reviewed by:. Arya P., and Qin H. Tetrahedron 56 (2000) 917-947
    • (2000) Tetrahedron , vol.56 , pp. 917-947
    • Arya, P.1    Qin, H.2
  • 25
    • 35748986310 scopus 로고    scopus 로고
    • note
    • These include (S)-(-)-4-benzyl-2-oxazolidinone and (S)-4-benzyl-5,5-dimethyl-2-oxazolidinone (Quat).
  • 27
    • 0037071136 scopus 로고    scopus 로고
    • For further examples of the use of this auxiliary in asymmetric conjugate addition reactions see:
    • For further examples of the use of this auxiliary in asymmetric conjugate addition reactions see:. Williams D.R., Kissel W.S., Li J.J., and Mullins R.J. Tetrahedron Lett. 43 (2002) 3723-3727
    • (2002) Tetrahedron Lett. , vol.43 , pp. 3723-3727
    • Williams, D.R.1    Kissel, W.S.2    Li, J.J.3    Mullins, R.J.4
  • 29
    • 35748957048 scopus 로고    scopus 로고
    • note
    • 1H NMR spectroscopy from the measurement of the integrals attributed to the β-methyl groups for each of the diastereoisomers. The configuration of 10 was confirmed by its synthesis using an alternative route. This involved reacting the lithium anion of isoxazolidinone 9 with the acyl chloride derivative of (R)-citronellic acid. GC-MS analysis of this derivative showed a retention time 16.26 min and the corresponding diastereoisomer derived from(S)-citronellic acid had a retention time of 16.12 min. GC-MS analysis of compound 10, mixture of diastereisomers, showed a major peak with a retention time of 16.11 min and a minor peak with retention time of 16.25 min. With these data we were able to confirm the configuration of the major diastereoisomer of 10 as C3-(S).
  • 30
    • 35748958600 scopus 로고    scopus 로고
    • note
    • Considerable amounts of degradation products resulted.
  • 34
    • 35748974406 scopus 로고    scopus 로고
    • note
    • Formed under standard non-racemising conditions: DMAP, methyl mandelate, DCCD.
  • 44
    • 34249816469 scopus 로고    scopus 로고
    • The absolute configuration was determined by single crystal X-ray diffraction studies.
    • The absolute configuration was determined by single crystal X-ray diffraction studies. Tyrrell E., Tesfa K.H., Mann A., and Singh K. Synthesis 10 (2007) 1491-1498
    • (2007) Synthesis , vol.10 , pp. 1491-1498
    • Tyrrell, E.1    Tesfa, K.H.2    Mann, A.3    Singh, K.4
  • 45
    • 35748985741 scopus 로고    scopus 로고
    • note
    • iPrOH-hexane.
  • 46
    • 35748985146 scopus 로고    scopus 로고
    • note
    • All compounds provided satisfactory spectral data that were consistent with the assigned structures. Optical rotation data and HPLC/GC-MS retention times are included for all relevant examples.
  • 47
    • 35748961017 scopus 로고    scopus 로고
    • note
    • To remove faster moving and base line residues only.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.