Cobalt Complexes Featuring N,O‐Bidentate Ligands with N‐Oxide Moieties: Synthesis, Characterization and Catalytic Activity in Acceptorless Dehydrogenative Coupling of Benzylic Alcohols with Aryl Amines DOI
Xuefeng Jia, Yinghua Yan, Chen Yang

и другие.

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Comprehensive Summary The transition metal‐catalyzed acceptorless dehydrogenative coupling of alcohols and amines is one the attractive important strategies for construction C=N bonds from perspective environmental friendliness economy. Herein, we report synthesis four novel phosphine‐free cobalt(II) complexes ( Co‐1 — Co‐4 ) with N,O‐bidentate ligands incorporating N‐oxide units their catalytic activity in benzylic aryl amines. X‐ray diffraction analyses revealed that central cobalt atoms three , Co‐2 were six‐coordinated adopted an octahedral geometry configuration. Catalytic evaluation demonstrated exhibited higher than other complexes. This system could provide a series corresponding imine products good functional groups compatibility high yields. Especially, use inexpensive complexes, along readily accessible featuring moieties, offers significant advantages this reaction.

Язык: Английский

Synthesis, Structural Analysis, and Catalysis for Suzuki–Miyaura Coupling Reactions of Tetradentate N^C^C^N and Tetracarbene C^C^C^C Nickel–N‐Heterocyclic Carbene Complexes DOI Open Access

Chuanqiu Gao,

Wen‐Qi Luo,

Xiao Xiao

и другие.

Applied Organometallic Chemistry, Год журнала: 2025, Номер 39(2)

Опубликована: Янв. 19, 2025

ABSTRACT Four novel Ni(II)– N ‐heterocyclic carbene (Ni–NHC) complexes were synthesized and characterized by NMR, ESI–MS, SEM, TEM, EDS mapping, XPS, single‐crystal X‐ray diffraction (XRD) analysis. Ni–NHC 7 8 are intramolecular tetradentate ^ C NHC N‐cyclometalated [1L + 1M] complex featuring coplanar of azole quinoline rings, 11 is an interligand tetracarbene ‐cyclometalated [2L with two six‐membered, conformation boat‐shaped, structural units. Complex 9@Ni–NHC a softly fluffy black powder the surface morphology tightly arranged honeycomb‐like pore structure may be containing very small amount Ni 0 state. DFT calculations suggested enhanced stability for . Cyclic voltammetry studies shown that , have similar redox properties pairs peaks, displays only one reversible process half‐wave potentials at E 1/2 = −0.864 V. All found to efficient catalysts Suzuki–Miyaura cross‐coupling reaction, display better catalytic activity than exhibit comparable Pd(OAc) 2 catalyst, which attributed intraligand chelating coordination conjugate effect between rings.

Язык: Английский

Процитировано

0
Cobalt Complexes Featuring N,O‐Bidentate Ligands with N‐Oxide Moieties: Synthesis, Characterization and Catalytic Activity in Acceptorless Dehydrogenative Coupling of Benzylic Alcohols with Aryl Amines DOI
Xuefeng Jia, Yinghua Yan, Chen Yang

и другие.

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Comprehensive Summary The transition metal‐catalyzed acceptorless dehydrogenative coupling of alcohols and amines is one the attractive important strategies for construction C=N bonds from perspective environmental friendliness economy. Herein, we report synthesis four novel phosphine‐free cobalt(II) complexes ( Co‐1 — Co‐4 ) with N,O‐bidentate ligands incorporating N‐oxide units their catalytic activity in benzylic aryl amines. X‐ray diffraction analyses revealed that central cobalt atoms three , Co‐2 were six‐coordinated adopted an octahedral geometry configuration. Catalytic evaluation demonstrated exhibited higher than other complexes. This system could provide a series corresponding imine products good functional groups compatibility high yields. Especially, use inexpensive complexes, along readily accessible featuring moieties, offers significant advantages this reaction.

Язык: Английский

Процитировано

0