메뉴 건너뛰기




Volumn , Issue 21, 2006, Pages 3547-3574

Cobalt-catalyzed cross-coupling reactions of heterocyclic chlorides with arylmagnesium halides and of polyfunctionalized arylcopper reagents with aryl bromides, chlorides, fluorides and tosylates

Author keywords

Cross coupling; Halides; Heterocycles; Magnesium; Transition metals

Indexed keywords

AROMATIC COMPOUNDS; BROMINE COMPOUNDS; CATALYSIS; MAGNESIUM PRINTING PLATES; TRANSITION METAL COMPOUNDS;

EID: 33751318942     PISSN: 00397881     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2006-950290     Document Type: Article
Times cited : (51)

References (113)
  • 5
    • 0037999512 scopus 로고    scopus 로고
    • Synthesis of natural products via palladium-catalyzed cross-coupling
    • Negishi, E., Ed.; Wiley-Interscience: New York
    • (a) Tan, Z.; Negishi, E. Synthesis of natural products via palladium-catalyzed cross-coupling, In Handbook of Organopalladium Chemistry for Organic Synthesis; Negishi, E., Ed.; Wiley-Interscience: New York, 2002, 863.
    • (2002) Handbook of Organopalladium Chemistry for Organic Synthesis , pp. 863
    • Tan, Z.1    Negishi, E.2
  • 59
    • 33751307775 scopus 로고    scopus 로고
    • note
    • In the absence of the cobalt catalyst, full conversion (GC) was detected only after four days at room temperature.
  • 61
    • 84890994745 scopus 로고    scopus 로고
    • Polyfunctional magnesium organometallics for organic synthesis
    • Knochel, P., Ed.; Wiley-VCH: Weinheim
    • (b) Knochel, P.; Krasovskiy, A.; Sapountzis, I. Polyfunctional Magnesium Organometallics for Organic Synthesis, In Handbook of Functionalized Organometallics; Knochel, P., Ed.; Wiley-VCH: Weinheim, 2005, 109.
    • (2005) Handbook of Functionalized Organometallics , pp. 109
    • Knochel, P.1    Krasovskiy, A.2    Sapountzis, I.3
  • 62
    • 33751309213 scopus 로고    scopus 로고
    • note
    • Commercial cobalt powder was used (Aldrich, 99.9+% purity).
  • 63
    • 33751320486 scopus 로고    scopus 로고
    • note
    • Commercial iron powder was used (Merck, ≥99.5% purity).
  • 68
    • 33751308723 scopus 로고    scopus 로고
    • note
    • (b) Besides CuCN·2LiCl, CuBr·2LiCl and CuSCN·2LiCl were also used for transmetalation, but CuCN·2LiCl gave better results
  • 69
    • 33751341157 scopus 로고    scopus 로고
    • note
    • After 24 hours reaction time only 47% conversion was observed.
  • 77
    • 33751329811 scopus 로고    scopus 로고
    • note
    • 29% conversion was observed after four hours and 42% conversion after 21 hours reaction time at 80 °C.
  • 78
    • 33751334903 scopus 로고    scopus 로고
    • note
    • Besides DMPU, NMP and N,N-dimethylacetamide (DMAC) also led to a rate acceleration, but DMPU showed the strongest effect.
  • 82
    • 33751340917 scopus 로고    scopus 로고
    • note
    • Confirmed by HMBC-NMR analysis.
  • 83
    • 0037112673 scopus 로고    scopus 로고
    • For a review on Pd-catalyzed cross-coupling reactions with aryl chlorides, see: Littke, A. F.; Fu, G. C. Angew. Chem. Int. Ed. 2002, 41, 4176.
    • (2002) Angew. Chem. Int. Ed. , vol.41 , pp. 4176
    • Littke, A.F.1    Fu, G.C.2
  • 84
    • 13544277170 scopus 로고    scopus 로고
    • and references cited therein
    • Selected examples: (a) Dankwardt, J. W. J. Organomet. Chem. 2005, 690, 932; and references cited therein.
    • (2005) J. Organomet. Chem. , vol.690 , pp. 932
    • Dankwardt, J.W.1
  • 90
    • 33751309450 scopus 로고    scopus 로고
    • note
    • No full conversion was observed if only 1.7 or 2 equivalents of copper reagent were used. In the absence of the cobalt-catalyst, no product was detected even after two days.
  • 91
    • 33751312921 scopus 로고    scopus 로고
    • note
    • A mixture of mono- and two-fold cross-coupling product was obtained if only three equivalents of the arylcopper reagents 5l or 5i was used.
  • 95
    • 1642320259 scopus 로고    scopus 로고
    • and references cited therein
    • (d) Tang, Z.-Y.; Hu, Q.-S. J. Am. Chem. Soc. 2004, 126, 3058; and references cited therein.
    • (2004) J. Am. Chem. Soc. , vol.126 , pp. 3058
    • Tang, Z.-Y.1    Hu, Q.-S.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.