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Synthesis of some halogenated tetraarylborates

Authors
Journal
Tetrahedron Letters
0040-4039
Publisher
Elsevier
Publication Date
Volume
44
Issue
39
Identifiers
DOI: 10.1016/s0040-4039(03)01881-1
Keywords
  • Grignard Reagents
  • Tetraarylborates
  • Trialkoxyboranes

Abstract

Abstract The reactions of 3,4-dichlorophenylmagnesium bromide and 3,5-dichlorophenylmagnesium bromide with B(OEt) 3 and NaBF 4 were studied The corresponding tetraarylborates [(3,4-Cl 2C 6H 3) 4B]NH 4 and [(3,5-Cl 2C 6H 3) 4B]Na were obtained and characterized. The significant influence of the substituents inductive effect on the reaction course was revealed. NaBF 4 was found to be a valuable boron reagent in the synthesis of tetraarylborates containing highly electronegative substituents. The molecular structure of [(3-CF 3C 6H 4) 4B]NH 4 obtained from the reaction of 3-trifluoromethylbromobenzene with NaBF 4 and Mg was determined using X-ray analysis.

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