A compound represented by the formula: ##STR00001## wherein R is selected from the group consisting of (i) substituted or unsubstituted alkyl with C=0 to 12 inclusive; (ii) substituted or unsubstituted aryl; and (iii) substituted and unsubstituted alkylaryl; wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen; wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen and R.sup.2 and R.sup.3 may optionally be bridged by a polymethylene group; wherein when C=0 in R, the combined group R.sup.1 R.sup.2 is the same as the combined group R.sup.3 R.sup.4; and wherein when C=1 in R, each of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are hydrogen.

A compound represented by the formula: ##STR00001## wherein R is selected from the group consisting of (i) substituted or unsubstituted alkyl with C=0 to 12 inclusive; (ii) substituted or unsubstituted aryl; and (iii) substituted and unsubstituted alkylaryl; wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen; wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen and R.sup.2 and R.sup.3 may optionally be bridged by a polymethylene group; wherein when C=0 in R, the combined group R.sup.1 R.sup.2 is the same as the combined group R.sup.3 R.sup.4; and wherein when C=1 in R, each of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are hydrogen.

A method for preparing 3,3-diaminobenzidine, the method comprising the following steps: subjecting 4,4-biphenol and N,N-dimethylsulfamoyl chloride to an esterification reaction in a specified solvent at 40-70? C. to obtain 4,4-biphenyl bis(N,N-dimethylaminosulfonate) as a first intermediate; subjecting the 4,4-biphenyl bis(N,N-dimethylaminosulfonate) to a chlorination reaction with a chlorinating reagent under acidic conditions to obtain 3,3-dichloro-4,4-biphenyl bis(N,N-dimethylaminosulfonate) as a second intermediate; subjecting the second intermediate 3,3-dichloro-4,4-biphenyl bis(N,N-dimethylaminosulfonate) to an ammonolysis reaction with anammoniation reagent in the presence of a combined catalyst to obtain a crude product of 3,3,4,4-tetraaminobiphenyl, wherein the combined catalyst is a mixture of proline, a cuprous salt and a phase transfer catalyst; and subjecting the crude product of 3,3,4,4-tetraaminobiphenyl to a post-treatment to obtain a purified 3,3,4,4-tetraaminobiphenyl product. In the present invention, 4,4-biphenol is used as a raw material, a brand-new synthesis route is used, the product purity is high, and pollution of three kinds of waste is reduced.

A method for preparing 3,3-diaminobenzidine, the method comprising the following steps: subjecting 4,4-biphenol and N,N-dimethylsulfamoyl chloride to an esterification reaction in a specified solvent at 40-70? C. to obtain 4,4-biphenyl bis(N,N-dimethylaminosulfonate) as a first intermediate; subjecting the 4,4-biphenyl bis(N,N-dimethylaminosulfonate) to a chlorination reaction with a chlorinating reagent under acidic conditions to obtain 3,3-dichloro-4,4-biphenyl bis(N,N-dimethylaminosulfonate) as a second intermediate; subjecting the second intermediate 3,3-dichloro-4,4-biphenyl bis(N,N-dimethylaminosulfonate) to an ammonolysis reaction with anammoniation reagent in the presence of a combined catalyst to obtain a crude product of 3,3,4,4-tetraaminobiphenyl, wherein the combined catalyst is a mixture of proline, a cuprous salt and a phase transfer catalyst; and subjecting the crude product of 3,3,4,4-tetraaminobiphenyl to a post-treatment to obtain a purified 3,3,4,4-tetraaminobiphenyl product. In the present invention, 4,4-biphenol is used as a raw material, a brand-new synthesis route is used, the product purity is high, and pollution of three kinds of waste is reduced.

Provided is a fluorine atom-containing compound represented by formula (1) below ##STR00001##
(In the formula, Z represents a predetermined divalent group, each Ar independently represents a predetermined aromatic ring-containing group, and each Ar.sup.F independently represents a predetermined fluorine atom-containing aryl group).

Provided is a fluorine atom-containing compound represented by formula (1) below ##STR00001##
(In the formula, Z represents a predetermined divalent group, each Ar independently represents a predetermined aromatic ring-containing group, and each Ar.sup.F independently represents a predetermined fluorine atom-containing aryl group).

Provided is a fluorine atom-containing compound represented by formula (1) below ##STR00001##
(In the formula, Z represents a predetermined divalent group, each Ar independently represents a predetermined aromatic ring-containing group, and each Ar.sup.F independently represents a predetermined fluorine atom-containing aryl group).

A compound having a chemical formula according to Formula (I) is disclosed where one of Z.sub.1, Z.sub.2 and Z.sub.3 is and one of the Z.sub.1, Z.sub.2, and Z.sub.3 that is bonded to a carbon atom that is adjacent to the carbon atom bonded to is P(AR.sub.1)(AR.sub.2). Metal-based catalyst and pre-catalysts, such as nickel-based catalysts and precatalysts, where the metal is complexed to the compound are also disclosed. Methods of forming C(sp2)-N bonds are also disclosed.

A compound having a chemical formula according to Formula (I) is disclosed where one of Z.sub.1, Z.sub.2 and Z.sub.3 is and one of the Z.sub.1, Z.sub.2, and Z.sub.3 that is bonded to a carbon atom that is adjacent to the carbon atom bonded to is P(AR.sub.1)(AR.sub.2). Metal-based catalyst and pre-catalysts, such as nickel-based catalysts and precatalysts, where the metal is complexed to the compound are also disclosed. Methods of forming C(sp2)-N bonds are also disclosed.

A compound having a chemical formula according to Formula (I) is disclosed where one of Z.sub.1, Z.sub.2 and Z.sub.3 is and one of the Z.sub.1, Z.sub.2, and Z.sub.3 that is bonded to a carbon atom that is adjacent to the carbon atom bonded to is P(AR.sub.1)(AR.sub.2). Metal-based catalyst and pre-catalysts, such as nickel-based catalysts and precatalysts, where the metal is complexed to the compound are also disclosed. Methods of forming C(sp2)-N bonds are also disclosed.