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Synthesis 1989; 1989(2): 130-131
DOI: 10.1055/s-1989-27172
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A Shorter Synthesis of Dithienopyridines Through Pd(0)-Catalyzed Coupling of 2-(2-Trimethylstannyl-3-thienyl)-1,3-dioxolane with tert- Butyl N-(ortho-Halothienyl)carbamates

Youhua Yang* , Anna-Britta Hörnfeldt, Salo Gronowitz
  • *Division of Organic Chemistry 1, Chemical Center, University of Lund, P.O. Box 124, S-22100 Lund, Sweden
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Publication Date:
17 September 2002 (online)

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Less sterically crowded 2-(2-trimethylstannyl-3-thienyl)-1,3-dioxolane (4) was prepared and coupled with tert-butyl N-(ortho-halothienyl) carbamates, catalyzed by Pd(0) complex, to give dithieno[3,2-b; 2′,3′-d] pyridine (5), dithieno[3,4-b; 2′,3′-d]pyridine (6), and dithieno[2,3-b; 2′,3′-d]pyridine (7) in good yields.

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