Difluorenoxysilanes are produced in high yield by catalytic fluoride activation of a mixture of TFMTMS and an acylsilane: Tetrabutylammonium difluorotriphenylstannate is an excellent catalyst whereas tetrabutylammonium fluoride leads directly to the aldol product corresponding to the difluoromethyl ketone. Some one-pot applications illustrate the usefulness of this methodology.
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Brigaud et al. (1994) studied this question.