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- W2014188427 abstract "2,3‐Bis(diphenylphosphino)‐1,3‐butadiene A method for synthesis of the title compound is described, using the readily available 2,3‐bis(diphenylphosphinoyl)‐1,3‐butadiene ( 1 ) as the starting material. For the protection of the diene system, 1 is first converted into the 1,4‐dibromo‐ and 1,4‐dichloro derivatives 2a and b , respectively, by addition of Br 2 or Cl 2 , respectively. The structure of 2b has been determined by single‐crystal X‐ray diffraction. The molecule has a centrosymmetrical ( E )‐configuration. Reduction of the phosphinoyl groups by HSiCl 3 (to give the bis(diphenylphosphino)compound 3), followed by removal of the Cl‐atoms using Zn powder, affords the bis(diphenylphosphino)butadiene 4 . Compounds 3 and 4 give quaternary phosphonium salts 5 and 6 , respectively, on addition of CH 3 OSO 2 F or CH 3 I. The sulfur analogue of 1 is formed on treatment of 4 with elemental sulfur." @default.
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- W2014188427 date "1987-11-04" @default.
- W2014188427 modified "2023-10-18" @default.
- W2014188427 title "2,3-Bis(diphenylphosphino)-1,3-butadien" @default.
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- W2014188427 doi "https://doi.org/10.1002/hlca.19870700725" @default.
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