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2005
Organo-boron compounds
S 0040
Stereoselective Hydroboration of Diynes and Triyne to Give Products Containing
Vinylene Bridges: A Versatile Application to Fluorescent Dyes and
05- 154 Multiple
Light-Emitting Copolymers. — Rhodium-catalyzed hydroboration of aromatic
diynes and triynes proceeds smoothly to give the corresponding polyboronates (III),
(VII) and (XI)/(XII) in moderate yields. The E/Z-selectivity of the formed double bonds
depends on the structure of polyyne center. The formed boronates are successfully coupled with chromophore-like (het)aryl bromides under Suzuki conditions to give complex compounds with various optical properties (V) and (IX). — (LEE, T.; BAIK, C.;
JUNG, I.; SONG, K. H.; KIM, S.; KIM, D.; KANG*, S. O.; KO, J.; Organometallics
23 (2004) 20, 4569-4575; Dep. Chem., Korea Univ., Jochiwon, Chungnam 339-700,
S. Korea; Eng.) — Mischke
2005
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