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Volumn , Issue 17, 2008, Pages 2663-2666

Phosphine-dependent selective cross-dimerization between terminal alkylacetylene and silylacetylene by iridium(I) guanidinate complex-phosphine system

Author keywords

Alkynes; Coupling; Dimerizations; Enynes; Iridium

Indexed keywords

ACETYLENE DERIVATIVE; ALKYLACETYLENE; ARYLACETYLENE; GUANIDINATE; GUANIDINE DERIVATIVE; IRIDIUM; PHOSPHINE; SILYLACETYLENE; UNCLASSIFIED DRUG;

EID: 55549093142     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-0028-1083514     Document Type: Article
Times cited : (35)

References (43)
  • 1
    • 0000501827 scopus 로고    scopus 로고
    • For recent example of transition-metal-catalyzed homodimerization of alkynes, see: a
    • For recent example of transition-metal-catalyzed homodimerization of alkynes, see: (a) Ohmura, T.; Yorozuya, S.; Yamamoto, Y.; Miyaura, N. Organometallics 2000, 19, 365.
    • (2000) Organometallics , vol.19 , pp. 365
    • Ohmura, T.1    Yorozuya, S.2    Yamamoto, Y.3    Miyaura, N.4
  • 23
    • 55549143182 scopus 로고    scopus 로고
    • Synthesis of {Ir[(N2 (i-Pr) 2CN(i-Pr)2](cod, 1) A solution of [IrCl(cod)]2 (281 mg, 0.42 mmol) in THF (5 mL) was cooled to -78 °C, and then a THF solution of Li[(N2 (i-Pr) 2CN(Z-Pr)2, which was prepared by the reaction of the DIC (0.13 mL, 0.84 mmol) with LDA solution (1.8 M in heptane-THF-ethylbenzene solution, 0.48 mL, 0.86 mmol) at -78 °C, was added. The mixture was allowed to warm to r.t. After 4 h, the volatiles were removed under reduced pressure. The residual solid was extracted with toluene and the filtrate was evaporated off under high vacuum to give orange complex 1 (278 mg, 0.53 mmol, 63, 1H NMR (400 MHz, C6D6, δ, 0.96 (d, J, 6.4 Hz, 12 H, i-PrCH3, 1.23 (d, J, 6.9 Hz, 12 H, i-PrCH3, 1.39 (d, J, 7.8 Hz, 4 H, cod, 2.20 br, 4 H
    • 3: C, 47.88; H, 7.65; N, 7.98. Found: C, 47.82; H, 7.60; N, 8.00.
  • 35
    • 55549145631 scopus 로고    scopus 로고
    • int = 0.063), 13318 observed [I > 2σ(I)]. R1 = 0.0353, wR2 = 0.0903 (all data). Atomic coordinates, thermal parameters, bond distances, and angles have been deposited at the Cambridge Crystallographic Data Center. CCDC number: 668977.
    • int = 0.063), 13318 observed [I > 2σ(I)]. R1 = 0.0353, wR2 = 0.0903 (all data). Atomic coordinates, thermal parameters, bond distances, and angles have been deposited at the Cambridge Crystallographic Data Center. CCDC number: 668977.
  • 36
    • 55549119815 scopus 로고    scopus 로고
    • 2O-hexane (1:3) as eluent. The solvent was removed to give dimeric product 3 or 4.
    • 2O-hexane (1:3) as eluent. The solvent was removed to give dimeric product 3 or 4.
  • 37
    • 55549131744 scopus 로고    scopus 로고
    • 3P: yield 79%, E/Z = 40:60
    • 3P: yield 79%, E/Z = 40:60
  • 41
    • 55549148086 scopus 로고    scopus 로고
    • 3): δ = 11.3,
  • 42
    • 55549107684 scopus 로고    scopus 로고
    • 1H NMR).
    • 1H NMR).
  • 43
    • 55549099754 scopus 로고    scopus 로고
    • 2PhP system: yield 88%, E/Z = 9:91.
    • 2PhP system: yield 88%, E/Z = 9:91.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.