Provided is an addition condensation product of an aromatic compound and a carbonyl compound. The addition condensation product includes an aromatic compound dimer in which two composition units derived from the aromatic compounds are bonded via one composition unit derived from the carbonyl compound and an aromatic compound multimer in which each of three or more composition units derived from the aromatic compounds is bonded via one composition unit derived from the carbonyl compound. A ratio of the aromatic compound dimer to the aromatic compound multimer is in the range of 1:75 to 1:1,000.

Provided is an addition condensation product of an aromatic compound and a carbonyl compound. The addition condensation product includes an aromatic compound dimer in which two composition units derived from the aromatic compounds are bonded via one composition unit derived from the carbonyl compound and an aromatic compound multimer in which each of three or more composition units derived from the aromatic compounds is bonded via one composition unit derived from the carbonyl compound. A ratio of the aromatic compound dimer to the aromatic compound multimer is in the range of 1:75 to 1:1,000.

The present invention relates to a method for the metal-free preparation of a biaryl compound by a photosplicing reaction and its use in the preparation of chemical compounds, preferably of active ingredients e.g. in the fields of pharmaceuticals and agrochemicals. In particular, it refers to a method for the regiocontrolled preparation of a biaryl compound of formula (I): ArAr by photochemically reacting a precursor compound of formula (II): ArLAr to form a biaryl compound of general formula: ArLAr(II).fwdarw.ArAr (I) wherein Ar and Ar, independently of each other, represent an unsubstituted or substituted C6-C20 aryl group or a heteroaryl group with 5-20 ring atoms selected from carbon, nitrogen, oxygen and sulfur, and L represents a group XYZ as defined herein. The biaryl compounds are generally suitable as intermediates or key building blocks in a very broad spectrum of organic chemical syntheses and their respective utilities. Their use within the field of synthesis of active ingredients is an aspect of the invention, and their use in the preparation of pharmaceutically active ingredients is particularly preferred.

The present invention relates to a method for the metal-free preparation of a biaryl compound by a photosplicing reaction and its use in the preparation of chemical compounds, preferably of active ingredients e.g. in the fields of pharmaceuticals and agrochemicals. In particular, it refers to a method for the regiocontrolled preparation of a biaryl compound of formula (I): ArAr by photochemically reacting a precursor compound of formula (II): ArLAr to form a biaryl compound of general formula: ArLAr(II).fwdarw.ArAr (I) wherein Ar and Ar, independently of each other, represent an unsubstituted or substituted C6-C20 aryl group or a heteroaryl group with 5-20 ring atoms selected from carbon, nitrogen, oxygen and sulfur, and L represents a group XYZ as defined herein. The biaryl compounds are generally suitable as intermediates or key building blocks in a very broad spectrum of organic chemical syntheses and their respective utilities. Their use within the field of synthesis of active ingredients is an aspect of the invention, and their use in the preparation of pharmaceutically active ingredients is particularly preferred.

The present invention relates to the compounds of formula (I) below:

##STR00001##

wherein: X represents an oxygen atom, a sulfur atom, a nitrogen atom or a CH radical, The bond XY and Y are absent if X represents an oxygen or sulfur atom, the bond XY and Y are present if X represents a nitrogen atom or a CH radical, When present, Y represents a group R if X represents a nitrogen atom, a hydrogen atom or a group NR.sup.1R.sup.2 if X represents a CH radical, (Het)Ar is an aromatic ring selected from the group consisting of aryl and heteroaryl groups, R.sup.3, R.sup.4, R.sup.5, R.sup.6 represent, independently of one another, a hydrogen atom, a halogen atom, a NR.sup.12R.sup.13, a SR.sup.14 group, a OR.sup.14 group or a CF.sub.3 group, When Y is NR.sup.1R.sup.2, the groups NR.sup.1R.sup.2 and (Het)Ar are in the cis-conformation,
or a pharmaceutically acceptable salt thereof,
for use in the treatment of proliferative diseases, infectious diseases, allergies, inflammation and/or asthma.

The present invention provides a method for producing indancarbaldehyde, including a step of reacting indan with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride to obtain a reaction liquid including indancarbaldehyde, wherein the indan includes an amine, and a content of the amine is less than 1000 ppm by mass.

The present invention provides a method for producing indancarbaldehyde, including a step of reacting indan with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride to obtain a reaction liquid including indancarbaldehyde, wherein the indan includes an amine, and a content of the amine is less than 1000 ppm by mass.

The present invention provides a method for producing indancarbaldehyde, including a step of reacting indan with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride to obtain a reaction liquid including indancarbaldehyde, wherein the indan includes an amine, and a content of the amine is less than 1000 ppm by mass.

The present invention provides a method for producing indancarbaldehyde, including a step of reacting indan with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride to obtain a reaction liquid including indancarbaldehyde, wherein the indan includes an amine, and a content of the amine is less than 1000 ppm by mass.

The present invention relates to a process for preparing a partially hydrogenated polyacene, and a novel intermediate used in such process; also the present invention relates to a process for preparing the corresponding conjugated polyacenes.