185515-88-2Relevant articles and documents
Syntheses and reactions of hexavalent organotellurium compounds bearing five or six tellurium-carbon bonds
Miyasato, Masataka,Sagami, Takao,Minoura, Mao,Yamamoto, Yohsuke,Akiba, Kin-Ya
, p. 2590 - 2600 (2007/10/03)
A variety of hexaorganotellurium compounds, Ar6-n(CH 3)nTe [Ar = 4-CF3C6H4, n = 0 (1a), n = 1 (3a), n = 2 (trans-4a and cis-4a), n = 3 (mer-5a), n = 4 (trans-6a); Ph, n = 0 (1b), n = 1 (3b), n = 2 (trans-4b); 4-CH3C 6H4, n = 0 (1c), n = 1 (3c), n = 2 (trans-4c), n = 4 (trans-6c); 4-BrC6H4, n = 0 (1d)] and Ar5(R)Te [Ar = 4-CF3C6H4, R = 4-CH3OC 6H4 (8); Ar = 4-CF3C6H4, R = vinyl (9), Ar = Ph, R = vinyl (10), Ar = 4-CF3C6H 4, R = PhSCH2 (11), Ar = Ph, R = PhSCH2 (12), Ar = 4-CF3C6H4, R = nBu (13)] and pentaorganotellurium halides, Ar5TeX [Ar = 4-CF3C 6H4, X = Cl (2a-Cl), X = Br (2a-Br); Ar = Ph, X = Cl (2b-Cl), X = Br (Zb-Br); Ar = 4-CH3C6H4, X = Cl (2c-Cl), X = Br (2c-Br); Ar = 4-BrC6H4, X = Br (2d-Br)] and (4-CF3C6H4)4(CH3)TeX [X = Cl (trans-7a-Cl) and X = Br (trans-7a-Br)] were synthesized by the following methods: 1) one-pot synthesis of 1a, 2) the reaction of SO 2Cl2 or Br2 with Ar5Te Li + generated from TeCl4 or TeBr4 with five equivalents of ArLi, 3) reductive cleavage of Ar6-m(CH 3)mTe (m = 0 or 2) with KC8 followed by treatment with CH3I, 4) valence expansion reaction from low-valent tellurium compounds by treatment with KC8 followed by reaction with CH3I, 5) nucleophilic substitution of Ar6-y-z(CH 3)zTeXy-z (X=Cl, Br, OTf; z = 0, 1; y= 1, 2) with organolithium reagents. The scope and limitations and some details for each method are discussed and electrophilic halogenation of the hexaorganotellurium compounds is also described.
TeAr6: Synthese und Struktur der ersten neutralen Hexaarylelementverbindungen
Minoura, Mao,Sagami, Takao,Akiba, Kin-ya,Modrakowski, Claudia,Sudau, Allexander,et al.
, p. 2827 - 2829 (2007/10/03)
Keywords: Hypervalente Verbindungen; Strukturaufklaerung; Tellurverbindungen
