The invention relates to hydroxybenzophenone-based compounds of formula (I) that are used to improve UV, thermal, and thereto-oxidative stability of high performance aromatic polymers in a blend or as end-cappers of the same polymers.

The invention relates to an organic ammonium salt of formula (I), wherein the symbols have the following meanings: A- is an anionic pesticide, R.sup.1 is H, C.sub.1C.sub.4-alkyl, CH.sub.2CH.sub.2OH or CH.sub.2CH(CH.sub.3)OH; R is H, CH.sub.3 or two adjacent radicals R together form a group —C(R′)— and R′ is equal to or different from H or CH.sub.3, wherein said salt is suitable for reducing the volatility of active substances in the spray application of anionic pesticides.

##STR00001##

The invention relates to an organic ammonium salt of formula (I), wherein the symbols have the following meanings: A- is an anionic pesticide, R.sup.1 is H, C.sub.1C.sub.4-alkyl, CH.sub.2CH.sub.2OH or CH.sub.2CH(CH.sub.3)OH; R is H, CH.sub.3 or two adjacent radicals R together form a group —C(R′)— and R′ is equal to or different from H or CH.sub.3, wherein said salt is suitable for reducing the volatility of active substances in the spray application of anionic pesticides.

##STR00001##

A diphenylsulfone compound containing 4,4′-dihydroxydiphenylsulfone is produced in good yield in a short time and at a relatively low temperature. A diphenylsulfone compound represented by formula (2) below is produced by irradiating, with microwaves, a compound represented by formula (1) below and a sulfonating agent so that a dehydration condensation reaction is carried out.

##STR00001##

A diphenylsulfone compound containing 4,4′-dihydroxydiphenylsulfone is produced in good yield in a short time and at a relatively low temperature. A diphenylsulfone compound represented by formula (2) below is produced by irradiating, with microwaves, a compound represented by formula (1) below and a sulfonating agent so that a dehydration condensation reaction is carried out.

##STR00001##

A process for the synthesis of Dapsone and intermediates thereof are described.

A process for the synthesis of Dapsone and intermediates thereof are described.

New diamine monomers bearing sulfone terminated pendant groups, as well as methods for making the same, are provided. The diamine monomers are useful toward making polyamide, polyimide, and poly(amide-imide) polymers and copolymers, which possess hygromorphic properties and demonstrate humidity driven motility.

New diamine monomers bearing sulfone terminated pendant groups, as well as methods for making the same, are provided. The diamine monomers are useful toward making polyamide, polyimide, and poly(amide-imide) polymers and copolymers, which possess hygromorphic properties and demonstrate humidity driven motility.

The present disclosure relates to a compound and a preparation method and application thereof, the compound having a chemical structure formula of:

##STR00001##

wherein M in the formula is selected from a group consisting of CF.sub.3 or CF.sub.2H, and R.sub.1, R.sub.2, and R.sub.3 are each independently selected from a group consisting of aryl, heteroaryl, and alkyl. The compound provided by the present disclosure can be used as a trifluoroethanolation reagent or difluoroethanolation reagent as synthetic intermediates of many organic compounds, and some of the compounds have pharmaceutical activity. The preparation steps of such compounds are simplified, with mild synthesis conditions and wide applicability of substrates.