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2005
Halogen compounds
Q 0090
Room Temperature Preparation of Trifluoroethenylzinc Reagent by Metalation
the Readily Available Halocarbon HFC-134a and an Efficient, Economically
07- 070 of
Viable Synthesis of 1,2,2-Trifluorostyrenes. — Treatment of the tetrafluoroethane (I)
with ZnCl2 and LDA at 0—20 °C offers a novel and effective method to prepare trifluoroethenylzinc reagents where mono- and bis-derivatives exist in equilibrium. Their
Pd-catalyzed coupling with aryl iodides provides a mild and efficient approach to
1,2,2-trifluorostyrenes as useful substrates of important polymers. —
(RAGHAVANPILLAI, A.; BURTON*, D. J.; J. Org. Chem. 69 (2004) 21, 7083-7091;
Dep. Chem., Univ. Iowa, Iowa City, IA 52242, USA; Eng.) — Jannicke
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