ACID-RESISTANT BASE AND/OR RADICAL GENERATOR, AND CURABLE RESIN COMPOSITION CONTAINING SAID BASE AND/OR RADICAL GENERATOR
The present invention relates to a compound represented by the general formula (A), a base- and/or radical-generating agent comprising the compound, and so on. In the formula, four pieces of R1 each independently represents a hydrogen atom or a
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Paragraph 0282; 0283
(2019/01/15)
BORATE-BASED BASE GENERATOR, AND BASE-REACTIVE COMPOSITION COMPRISING SUCH BASE GENERATOR
An object of the present invention is to provide a compound which is capable of attaining a composition having high storage stability without reacting with a base-reactive compound, even in the case of storage for a long period of time in a mixed state wi
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Paragraph 0502
(2016/12/12)
Process for preparing ring-fluorinated aromatics
The present invention relates to an improved process for preparing ring-fluorinated aromatics of the general formula (I) by a halogen exchange reaction (halex reaction) of a plurality of halogen substituents in one stage in the presence of a catalyst.
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Page/Page column 4
(2008/06/13)
Halex reactions of aromatic compounds catalysed by 2-azaallenium, carbophosphazenium, aminophosphonium and diphosphazenium salts: A comparative study
An increasing number of biologically active compounds in the pharma and agro-chemical sector contain carbon fluorine bonds. One of the most common methods to introduce fluorine into intermediates is the well-investigated halogen-exchange reaction, in which chloro- and bromoaromatics activated towards nucleophilic substitution, react with a fluoride source to yield the corresponding fluoroarenes. In general, the reaction is supported by phase-transfer catalysts. The use of a new class of very active phase-transfer catalysts gives the possibility of substituting even halogens with weak activation giving a convenient access to interesting compounds that are not available so far and opening up new synthetic routes in Halex chemistry. Our new classes of catalysts, CNC+ (1a), PNC+ (2a) and several different approaches presented by other groups are described and experimental results discussed.