The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent device with improved driving voltage and/or power efficiency can be provided by using the organic electroluminescent compound according to the present disclosure.

The present invention provides compounds of formulae (1) (2) wherein R.sup.1 and R.sup.2 are C.sub.1-30alkyl, C.sub.2-3O-alkenyl, C.sub.2-30-alkynyl, C.sub.5-7-cycloalkyl, C.sub.6-14-aryl or 5 to 14 membered heteroaryl, wherein C.sub.1-30-alkyl, C.sub.2-3O-alkenyl and C.sub.2-3O-alkynyl can be substituted with one or more substituents selected from the group consisting of halogen, phenyl, O—C.sub.1-20-alkyl, O—C.sub.2-20-alkenyl and O—C.sub.2-2O-alkynyl, and wherein C.sub.5-7-cycloalkyl, C.sub.6-14-aryl and 5 to 14 membered heteroaryl can be substituted with one or more substituents selected from the group consisting of halogen, C.sub.1-20alkyl, C.sub.2-2O-alkenyl, C.sub.2-2O-alkynyl, O—C.sub.1-20-alkyl, O—C.sub.2-2o-alkenyl and O—C.sub.2-2o-alkynyl, R.sup.a, R.sup.b, R.sup.c and R.sup.d are independently and at each occurrence selected from the group consisting of C.sub.1-30alkyl, C.sub.2-30-alkenyl, C.sub.2-30-alkynyl, C.sub.6-14-aryl and 5 to 14 membered heteroaryl, wherein C.sub.1-30-alkyl, C.sub.2-3o-alkenyl and C.sub.2-3o-alkynyl can be substituted with one or more substituents selected from the group consisting of halogen, phenyl, O—C.sub.1-20-alkyl, O—C.sub.2-20-alkenyl and O—C.sub.2-20-alkynyl, and wherein C.sub.5-7-cycloalkyl, C.sub.6-14-aryl and 5 to 14 membered heteroaryl can be substituted with one or more substituents selected from the group consisting of halogen, C.sub.1-20alkyl, C.sub.2-2o-alkenyl, C.sub.2-20-alkynyl, O—C.sub.1-20-alkyl, O—C.sub.2-20-alkenyl and O—C.sub.2-2o-alkynyl, n and o are independently 0, 1, 2, 3, 4 or 5, and m and p are independently 0, 1, 2 or 3, and to electronic device comprising the compounds of formulae 1 or 2. ##STR00001##

The compound represented by formula (1): ##STR00001##
wherein A, B, R.sup.1, and R.sup.2 are as defined in the description, provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

The compound represented by formula (1): ##STR00001##
wherein A, B, R.sup.1, and R.sup.2 are as defined in the description, provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

The compound represented by formula (1):

##STR00001##

wherein A, B, R.sup.1, and R.sup.2 are as defined in the description,
provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

The compound represented by formula (1):

##STR00001##

wherein A, B, R.sup.1, and R.sup.2 are as defined in the description,
provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.

The present invention relates to the composition and method of use of Stat3 pathway inhibitors or cancer stem cell inhibitors in combination treatment of cancer.

The present invention relates to the composition and method of use of Stat3 pathway inhibitors or cancer stem cell inhibitors in combination treatment of cancer.

The present invention relates to the use of a novel class of cancer stem cell pathway (CSCP) inhibitors; to methods of using such compounds to treat refractory, recurrent, or metastatic cancers; to methods of selective killing cancer cells by using such corn pounds with specific administration regimen; to methods of targeting cancer stem cells by inhibiting Stat3 pathway; to methods of using novel compounds in the treatment of conditions or disorders in a mammal related to aberrant Stat3 pathway activity; and to processes for preparing such compounds and intermediates thereof and to the pharmaceutical compositions of relevant compounds, and to the specific methods of administration of these compounds.

The present invention relates to the use of a novel class of cancer stem cell pathway (CSCP) inhibitors; to methods of using such compounds to treat refractory, recurrent, or metastatic cancers; to methods of selective killing cancer cells by using such corn pounds with specific administration regimen; to methods of targeting cancer stem cells by inhibiting Stat3 pathway; to methods of using novel compounds in the treatment of conditions or disorders in a mammal related to aberrant Stat3 pathway activity; and to processes for preparing such compounds and intermediates thereof and to the pharmaceutical compositions of relevant compounds, and to the specific methods of administration of these compounds.