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Volumn 8, Issue 15, 1997, Pages 2633-2643

Enantiomerically pure γ-oxidofunctionalised organolithium compounds from chiral oxetanes

Author keywords

[No Author keywords available]

Indexed keywords

ORGANOLITHIUM COMPOUND; OXETANE DERIVATIVE;

EID: 0030849918     PISSN: 09574166     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0957-4166(97)00274-7     Document Type: Article
Times cited : (32)

References (60)
  • 6
    • 0001944329 scopus 로고
    • For the first account on the preparation of β-oxygen or β-nitrogen-containing organolithium compounds of the type II by mercury-lithium exchange, see: Barluenga, J.; Fañanás, F. J.; Yus, M.; Asensio, G. Tetrahedron Lett. 1978, 2015-2916.
    • (1978) Tetrahedron Lett. , pp. 2015-2916
    • Barluenga, J.1    Fañanás, F.J.2    Yus, M.3    Asensio, G.4
  • 36
    • 0343994019 scopus 로고    scopus 로고
    • See reference 5x
    • (e) See reference 5x.
  • 40
    • 0343121928 scopus 로고    scopus 로고
    • See also references 5g,h
    • (c) See also references 5g,h.
  • 42
    • 0030496093 scopus 로고    scopus 로고
    • (b) For a recent review, see: Yus, M. Chem. Soc. Rev. 1996, 155-161.
    • (1996) Chem. Soc. Rev. , pp. 155-161
    • Yus, M.1
  • 47
    • 0343121931 scopus 로고    scopus 로고
    • note
    • c)/3. The convergent refinement (ave., max. Δ/σ=0.002,0.021) gave R1=0.1236, wR2=0.3337, and quality-of-fit=1.116. Twin models were tested for hypothetical two-fold twin axes along [100], [101], and [001], and for a hypothetical 3-fold twin axis along [010]. None of these models led to improvement of the agreement factors. The absolute configuration was established by the known stereochemistries at chiral carbon atoms C(1), C(4), C(21), and C(24). Detailed structural results have been deposited at the Cambridge Crystallographic Data Centre.
  • 48
    • 0003775769 scopus 로고    scopus 로고
    • ©1996, Delft Instruments X-ray Diffraction bv, Delft, The Netherlands
    • (b) Diffractometer control program: CAD4-PC Version 2.0, ©1996, Delft Instruments X-ray Diffraction bv, Delft, The Netherlands.
    • Diffractometer Control Program: CAD4-PC Version 2.0
  • 49
    • 0343557864 scopus 로고    scopus 로고
    • note
    • (c) Data were processed on an AlphaStation 200 4/166 (AlphaVMS V6.2), with the program XCAD4B (K. Harms, University of Marburg) and with the commercial package SHELXTL-PLUS Release 5.05/V: ©1996, Siemens Analytical X-ray Instruments, Inc., Madison, Wisconsin. Further calculations were done on a Hewlett-Packard 9000 Model 715/50 (HP-UX V9.05).
  • 54
    • 0342687566 scopus 로고    scopus 로고
    • note
    • Oxetanes 4 and 7 are not enantiomerically pure compounds. They are a ca. 1:1 diastereomeric mixture due to the new stereogenic centre, which has been created at the ketalic carbon during the protection reaction of the alcohol with dihydropyran.
  • 59
    • 0343994012 scopus 로고    scopus 로고
    • Mixture of diastereoisomers, which could not be separated by flash chromatography or in TLC
    • Mixture of diastereoisomers, which could not be separated by flash chromatography or in TLC.
  • 60
    • 0343994011 scopus 로고    scopus 로고
    • note
    • + signal.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.