Dimethyl- sodium tetraphenylborate

Dimethyl tellurium dichloride, diphenyl tellurium dichloride and heterocyclic tellurium diiodides reacted with sodium tetraphenylborate in methanol or ethanol to produce telluronium tetraphenylborates5. 

Dimethyl Phenyl Telluronium Tetraphenylborate1 0.46 g (2 mmol) of dimethyl telluronium dichloride are dissolved in 30 ml of absolute methanol and a solution of 1.7 g (5 mmol) of sodium tetraphenylborate in 30 ml of methanol is added dropwise with stirring at 20°. Stirring is continued for 2 h, the mixture is filtered, and the solid is recrystallized from ethyl methyl ketone yield 0,81 g (65%) decomposes above 200°. 

Reaction of sodium dithiocarbamate with an equimolar amount of the chloroacetaldehyde/sodium hydrogen sulfite adduct (110) in dimethyl-formamide at room temperature yields 111 quantitatively. The latter, treated first with concentrated sulfuric acid and then with sodium tetraphenylborate, gives the salt 112 in 86% yield.Under the same conditions, piperi-dinium dithiobenzoate reacts with 110 providing in 64% yield 2-phenyl-l,3-dithiolium tetraphenylborate. ... 

A systematic study for boronic acid replacements for N—H bond arylations has been investigated, and the outcome compares favorably to the O—H bond arylation reaction (Table 4.6) [17,41]. However, to date no catalytic in copper variations have been reported with these alternative aryl donors. The best donors are triarylborox-ines and boronic acid esters derived from 2,2 -dimethyl-l,3-propanediol and 1,3-propanediol and, as in the case of the O—H bond arylation, the pinacolate esters are poor aryl donors. Sodium tetraphenylborate is also an alternative phenyl donor in the copper] 11)-mediated, microwave-assisted N-arylation using KF-AI2O3 as heterogeneous base in the absence of solvent [30]. 

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