A light-emitting layer of an organic electroluminescent device comprises the following compound (I):
1
wherein X
1
and X
2
are a cyano group; R
1
is a C
1
-
6
alkyl group; R
2
is a hydrogen atom or a C
1-6
alkyl group; R
3
is a hydrogen atom or a C
1-6
alkyl group; the ring Z represents an aromatic hydrocarbon ring which has a substituent such as a N-substituted amino group, or a heterocycle which has a substituent such as a N-substituted amino group. The present invention provides an azepine compound useful for a light emission material of organic electroluminescent devices, and a process for producing the same.