US 11,807,612 B2
Heterocyclic compound and salt thereof, and luminescent substrate composition
Shojiro Maki, Chofu (JP); Nobuo Kitada, Chofu (JP); Ryohei Moriya, Hachioji (JP); Hiroshi Aoyama, Hachioji (JP); and Ryosuke Ijuin, Hachioji (JP)
Assigned to The University of Electro-Communications, Chofu (JP); and TOKYO UNIVERSITY OF PHARMACY & LIFE SCIENCES, Hachioji (JP)
Appl. No. 17/999,931
Filed by The University of Electro-Communications, Chofu (JP); and TOKYO UNIVERSITY OF PHARMACY & LIFE SCIENCES, Hachioji (JP)
PCT Filed Jun. 29, 2021, PCT No. PCT/JP2021/024620
§ 371(c)(1), (2) Date Nov. 28, 2022,
PCT Pub. No. WO2022/004744, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 2020-112102 (JP), filed on Jun. 29, 2020.
Prior Publication US 2023/0192635 A1, Jun. 22, 2023
Int. Cl. C07D 277/56 (2006.01); C09K 11/06 (2006.01)
CPC C07D 277/56 (2013.01) [C09K 11/06 (2013.01); C09K 2211/1018 (2013.01)] 20 Claims
 
1. A heterocyclic compound of formula (1):

OG Complex Work Unit Chemistry
where R1, R2, and R3 are each independently hydrogen or an alkyl group having a carbon number of 1 to 4, with provisos that R1 and R2 are optionally bonded to each other to form a ring and that one of R1 and R2 is optionally bonded to Y1 to form a ring,
X is S, O, NR4, or CH2, and Y1 and Y2 are each independently N or CR4, where each R4 is independently hydrogen, an alkyl group having a carbon number of 1 to 4, an alkenyl group having a carbon number of 2 to 4, or an acyl group having a carbon number of 2 to 4, and
n is an integer of 0 to 4.