An organic electroluminescence device includes a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, an electron transport region on the emission layer, and a second electrode on the electron transport region. The hole transport region includes a monoamine compound represented by the following Formula 1: ##STR00001##

A process for preparation of 4-aminoindane compounds of a first formula, salts and enantiomers thereof including: a) hydrogenating a 1,2-dihydroquinoline of a second formula to give a corresponding tetrahydroquinoline of a third formula; b) acylating the tetrahydroquinoline of the third formula with a carboxylic acid derivative of a fourth formula to obtain a corresponding acyl derivative compound of a fifth formula; c) rearranging the acyl derivative compound of the fifth formula under acidic conditions so as to give an acyl indane compound of a sixth formula or an addition salt thereof; and d) hydrolysing the acyl group of the acyl indane compound of the sixth formula so as to obtain the 4-aminoindane derivatives of the first formula.

A process for preparation of 4-aminoindane compounds of a first formula, salts and enantiomers thereof including: a) hydrogenating a 1,2-dihydroquinoline of a second formula to give a corresponding tetrahydroquinoline of a third formula; b) acylating the tetrahydroquinoline of the third formula with a carboxylic acid derivative of a fourth formula to obtain a corresponding acyl derivative compound of a fifth formula; c) rearranging the acyl derivative compound of the fifth formula under acidic conditions so as to give an acyl indane compound of a sixth formula or an addition salt thereof; and d) hydrolysing the acyl group of the acyl indane compound of the sixth formula so as to obtain the 4-aminoindane derivatives of the first formula.

An aryldiamine compound represented by formula (1) and an organic electroluminescent device including a pair of electrodes and at least one organic layer disposed therebetween wherein the at least one organic layer contains the aryldiamine compound. The aryldiamine compound is excellent in hole transporting properties, hole injection properties, electron blocking properties, stability in thin film form, and heat resistance. The organic electroluminescent device achieves high emission efficiency and power efficiency, drives at a low voltage, and, in particular, has a long life.

##STR00001##

Aniline derivatives such as those represented by the formula shown, for example, have good solubility with respect to organic solvents, and are able to provide an organic electroluminescent element having excellent luminance characteristics when a thin film containing said aniline derivatives is used as a charge transporting substance in a hole injection layer. ##STR00001##
(In the formula, DPA represents a diphenylamino group.)

Aniline derivatives such as those represented by the formula shown, for example, have good solubility with respect to organic solvents, and are able to provide an organic electroluminescent element having excellent luminance characteristics when a thin film containing said aniline derivatives is used as a charge transporting substance in a hole injection layer. ##STR00001##
(In the formula, DPA represents a diphenylamino group.)

The present invention relates to a hole transporting material having a structure of formula (I). The present invention provides a hole transporting material having at least one saturated six-membered carbon ring and benzene ring(s) having non-hydrogen substituent(s) in the formula and being capable of obtaining a suitable mobility rate without occurrence of crosstalk between pixels; and the hole transporting material provided by the present invention is capable of satisfying the requirements on MASK cleaning in terms of solubility (NMP solvent).

The present invention relates to a hole transporting material having a structure of formula (I). The present invention provides a hole transporting material having at least one saturated six-membered carbon ring and benzene ring(s) having non-hydrogen substituent(s) in the formula and being capable of obtaining a suitable mobility rate without occurrence of crosstalk between pixels; and the hole transporting material provided by the present invention is capable of satisfying the requirements on MASK cleaning in terms of solubility (NMP solvent).

The present invention relates to a method for preparing substituted 4-aminoindane derivatives of the general formula (I)

##STR00001##

by rearrangement of compounds of the formula (II) in HF, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 have the definitions as specified in the description.

The present invention relates to a method for preparing substituted 4-aminoindane derivatives of the general formula (I)

##STR00001##

by rearrangement of compounds of the formula (II) in HF, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 have the definitions as specified in the description.