Heterogeneous mesoporous manganese oxide catalyst for aerobic and additive-free oxidative aromatization of N-heterocycles.
Herein, we report a heterogeneous, aerobic, additive-free and environmentally benign catalytic protocol for oxidative aromatization of saturated nitrogen-heterocycles using a mesoporous manganese oxide material. The aromatized products can be separated by easy filtration and the catalyst is reusable for at least four cycles. Mechanistic investigation provides evidence for radical intermediates, a multi-electron redox cycle between Mn centers, and an oxygen exchange mechanism.
Department of Chemistry, University of Connecticut, 55 North Eagleville Rd., Storrs, Connecticut 06269, USA. alfredo.angeles-boza@uconn.edu steven.suib@uconn.edu.
Kankana
K
Mullick
Department of Chemistry, University of Connecticut, 55 North Eagleville Rd., Storrs, Connecticut 06269, USA. alfredo.angeles-boza@uconn.edu steven.suib@uconn.edu.
Sourav
http://orcid.org/0000-0001-7368-3947
S
Biswas
Department of Chemistry, University of Connecticut, 55 North Eagleville Rd., Storrs, Connecticut 06269, USA. alfredo.angeles-boza@uconn.edu steven.suib@uconn.edu.
Alfredo M
http://orcid.org/0000-0002-5560-4405
AM
Angeles-Boza
Department of Chemistry, University of Connecticut, 55 North Eagleville Rd., Storrs, Connecticut 06269, USA. alfredo.angeles-boza@uconn.edu steven.suib@uconn.edu.
Steven L
SL
Suib