Abstract
Abstract Quaternary onium triorgano(difluoro)silicates R 1 2 R 2 SiF 2 − Q + were prepared by reaction of the corresponding quaternary onium hydrogendifluoride (Q + H 2 F 2 − ) with a (triorgano)silane or a silyl enol ether. These silicates were isolated in very high yield and purity >99% by excluding halogenated solvents from the synthetic protocol. Ph 3 SiF 2 − Bu 4 N + (TBAT) was used as phenylating agent of aromatic halides in DMSO, at 120 °C and in the presence of 2.5% M equivalents of allyl palladium chloride dimer (APC) as a catalyst.
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