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Volumn 82, Issue 2, 2010, Pages 1143-1149

McMurry coupling of diformyldithienylacetylene: Synthesis of [24]-, [36]-, and [48]annulenes composed of thiophene, acetylene, and ethylene units

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EID: 79952748096     PISSN: 03855414     EISSN: 18810942     Source Type: Journal    
DOI: 10.3987/COM-10-S(E)96     Document Type: Article
Times cited : (11)

References (31)
  • 22
    • 79952746544 scopus 로고    scopus 로고
    • note
    • 9 with n-BuLi (2.75 equiv.) at 0 °C and DMF (2.9 equiv.) in the temperature range from 0 °C to room temperature.
  • 24
    • 79952752910 scopus 로고    scopus 로고
    • note
    • +).
  • 25
    • 79952757183 scopus 로고    scopus 로고
    • note
    • +). Chemical equation presented.
  • 26
    • 79952747458 scopus 로고    scopus 로고
    • note
    • 1 = 0.0796, Rw = 0.1854, GOF = 1.060. Among a total of 11150 reflections measured, 3752 were unique, and the observed (I > 2.00σ(I )) 2948 reflections were used for the refinement. The crystal structure was solved by using the SHELXS-97 program and refined by using the full matrix least-squares method in the SHELXS-97 software package. Cambridge Crystallographic Data Centre deposition No. CCDC-752997.
  • 27
    • 79952773424 scopus 로고    scopus 로고
    • note
    • The most stable diastereomers of 2b and 3b are all-Z-and E,Z,E,Z-isomers, respectively, on the basis of MO calculations at the B3LYP/6-31G(d) level.
  • 28
    • 79952771999 scopus 로고    scopus 로고
    • note
    • F = 0.546).
  • 29
    • 79952758889 scopus 로고    scopus 로고
    • note
    • 6 as a supporting electrolyte.
  • 30
    • 79952749454 scopus 로고    scopus 로고
    • note
    • 4 Since the S S interatomic distances are 3.014 and 3.024 Å, which are 18.3% and 18.5% shorter than the sum of van der Waals radii (3.7 Å) respectively, the distances are too short to stabilize the structure. However, the π-π stacking interactions in the crystal may stabilize the planar structure.
  • 31
    • 79952750389 scopus 로고    scopus 로고
    • note
    • HOMOs of 1a on the basis of MO calculations at the B3LYP/6-31G(d) level are as follows: Chemical equation presented.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.