Abstract: The present invention relates to a novel class of tri-aryl compounds, compositions comprising the same and processes for the preparation thereof.

Abstract: Trisphenols of general formula (1), which are useful as starting materials for polymer, are industrially easily produced by a method using as a starting material 4-aralkylphenol derivatives expressed by general formula (2): wherein X represents a hydrogen atom or leaving group that can be substituted with a hydrogen atom.

Abstract: Provided herein is a compound of Formula 1: or an isomer thereof, or a salt of the compound or of an isomer thereof, wherein R1 and R2 are each independently selected from the group consisting of hydrogen, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, dialkylamino, halodialkylamino, hydroxyalkyl, and cyano, and R is selected from the group consisting of alkyl, haloalkyl, cyanoalkyl, alkoxy, dialkylamino, and cyano.

Abstract: A method for preparing 1,1,1,-tris(4-hydroxyphenyl)alkanes generally comprises reacting a mixture of an aromatic hydroxy compound and a ketone in the presence of at least one ion exchange resin catalyst and optionally a co-catalyst to produce the 1,1,1-tris(4-hydroxyphenyl)alkanes of formula:

Abstract: The invention provides a partially protected trisphenol having the general formula (I) wherein R1 is an alkyl group of 1-4 carbons or an alkoxyl group of 1-4 carbons, R2 is an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbons, X1 is a hydrogen atom, an alkoxycarbonylmethyl group wherein the alkyl group has 1-4 carbons, an alkoxycarbonyl group wherein the alkyl group has 1-4 carbons or a tetrahydropyranyl group, X2 is a hydrogen atom, an alkoxycarbonylmethyl group wherein the alkyl group has 1-4 carbons, an alkoxycarbonyl group wherein the alkyl group has 1-4 carbons or a tetrahydropyranyl group, provided that when X1 is a hydrogen atom, X2 is not a hydrogen atom, and when X2 is a hydrogen atom, X1 is not a hydrogen atom; and m is an integer of 0, 1 or 2, and n is an integer of 0, 1, 2 or 3.

Abstract: The present invention relates to polyalkylene oxide porogens having hyper-branches and low dielectric-constant insulators using them. More particularly, the present invention relates to polyalkylene oxide porogens having hyper-branches expressed by the following formula (1), where the polyalkylene oxide porogen has a center molecular (D) having branches (W), and low dielectric-constant insulators having nanopores prepared by coating a mixture of the porogen and a high heat-resistant resin such as polysilsesquioxane and thermal treating the coated substrate at a temperature effective to degrade the porogen.

Abstract: The present invent n provides a method for the preparation of triarylmethyl protecting group reagents. The reagents are prepared from reaction effluent from the cleavage step of oligonucleotide synthetic regimes.

Abstract: The present invention provides a method for the preparation of triarylmethyl protecting group reagents. The reagents are prepared from reaction effluent from the cleavage step of oligonucleotide synthetic regimes.

Abstract: An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1, 1-tris(4'-hydroxyphenyl)ethane is provided which comprises heating a mixture comprising phenol and 4-hydroxy acetophenone in the presence of effective amounts of an ion exchange catalyst and a mercaptan as a copromoter such that the resulting 1, 1, 1-tris(4'-hydroxyphenyl)ethane is substantially free of various reaction impurities.

Abstract: New trityl linkers for use in solid phase synthesis comprise compounds of formula II ##STR1## wherein R.sub.4 is alkyl (e.g. C.sub.1-4 alkyl), halogen, NO.sub.2, or hydrogen;Z is a coupling group chosen from acylamido, acyloxy, amino, halogen, thiol or hydroxyl,where acyl is the residue of a carboxylic acid or a residue of formula R.sub.5 CO where R.sub.5 is an organic group;Y is H, a reactive functional group or an attachment to a solid phase;W is O when Y is H or a reactive functional group, or W is --NH--, or --NR.sub.6 --(urethane) when Y is an attachment to a solid phase,where R.sub.6 is an organic group and,each R which, may be the same or different, is C(O)NR.sub.7 R.sub.8, CF.sub.3, F or Cl wherein each R.sub.7 and R.sub.8, which may be the same or different, is H or C.sub.

Abstract: An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1,1-tris(4'-hydroxyphenyl)ethane is provided which comprises heating a mixture comprising phenol and 4-hydroxy acetophenone in the presence of effective amounts of an ion exchange catalyst and a mercaptan as a copromoter such that the resulting 1,1,1-tris(4'-hydroxyphenyl)ethane is substantially free of various reaction impurities.

Abstract: Aromatic trisanhydrides of the formula (I) ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.4 alkyl or aryl are useful for the synthesis of star-branched and star-burst polyester-imides and polyesterimide-amides and as curing agents for epoxy resins, phenolics and polyesters.

Abstract: Dihydric phenol suitable for the preparation of polycarbonates are represented by the following formula: ##STR1##

Abstract: Synthetic procedures to tetraalkyls, tetraacids and dianhydrides substituted 1,1,1-triaryl-2,2,2-trifluoroethanes which comprises: (1) 1,1-bis(dialkylaryl)-1-aryl-2,2,2-trifluoroethane, (2) 1,1-bis(dicarboxyaryl)-1-aryl-2,2,2-trifluoroethane or (3) cyclic dianhydride or diamine of 1,1-bis(dialkylaryl)-1-aryl-2,2,2-trifluoroethanes. The synthesis of (1) is accomplished by the condensation reaction of an aryltrifluoromethyl ketone with a dialkylaryl compound. The synthesis of (2) is accomplished by oxidation of (1). The synthesis dianhydride of (3) is accomplished by the conversion of (2) to its corresponding cyclic dianhydride. The synthesis of the diamine is accomplished by the similar reaction of an aryltrifluoromethyl ketone with aniline or alkyl substituted or disubstituted anilines. Also, other derivatives of the above are formed by nucleophilic displacement reactions.