The Synthesis of O-Aminobenzoate Catalyzed by Iodine with S8 as an Oxidant DOI
Chenxi Huang,

Peilin Qi,

yujin li

et al.

Published: Jan. 1, 2024

Language: Английский

Photochemical Manganese-Catalyzed [2 + 2 + 2] Cycloaddition Reactions DOI Creative Commons

Benedikt N. Baumann,

Phong Dam, Jabor Rabeah

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 5718 - 5730

Published: March 24, 2025

We report the cyclotrimerization reactions of triynes using Mn(I) complexes derived from MnBr(CO)5 and phosphine ligands, such as 1,1-bis(diphenylphosphino)methane (dppm). These are driven by irradiation under mild conditions (30–80 °C) without need additional photoinitiators. Our catalytic screening revealed that counteranions ligands significantly influence process. This method accommodates a broad range functionalities in substrates, including alkyl, aryl, Bpin, SiMe3, GeEt3, PPh2, pyridyl, thienyl moieties, notable interference transformation. Additionally, this enables with oligoalkynes-like (un)substituted hexaynes, producing 2-fold cyclization products very good yields. Under stoichiometric conditions, diynes phosphaalkynes results unique photochemical synthesis phosphinines. Experimental theoretical mechanistic studies indicate dissociation diphosphine ligand precedes involvement Mn carbonyl species cycle. The plays crucial role stabilizing catalyst during transformation preventing formation unreactive cluster species.

Language: Английский

Citations

0
Concise synthesis of succinimide-fused 1,3-cyclohexadienes via Co-catalyzed [2 + 2 + 2] cycloaddition of 1,6-diynes and maleimides DOI

Kaili Cen,

Ziyi Zhai,

Yuan Liu

et al.

Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(11), P. 3257 - 3262

Published: Jan. 1, 2024

This work has realized a facile assembly of succinimide-fused 1,3-cyclohexadienes via Co-catalyzed [2 + 2 2] cycloaddition 1,6-diynes to maleimides. Furthermore, the oxidation was carried out under I /MeONa.

Language: Английский

Citations

3
Cobalt/Photoredox Cooperative Catalysis‐Enabled Cycloaddition Reactions of 1,6‐Diynes and Related Compounds DOI Creative Commons
Takeshi Yasui, Yoshihiko Yamamoto

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(16)

Published: April 8, 2024

Abstract Cobalt catalysts have recently gained considerable attention as alternatives to based on precious transition metals such Rh and Ir. Recently, Co/photoredox cooperative catalysis has emerged a powerful tool that enables versatile transformations, including cycloaddition reactions of unsaturated compounds. In particular, 1,6‐diyne derivatives are fascinating substrates for these because the corresponding exocyclic 1,3‐diene products can be further transformed into sp 3 ‐rich carbocycles heterocycles via functionalization diene moiety. The dual catalytic system facilitate not only activation π‐bond only, alkyne cyclotrimerization, but also involving σ‐bond activation. This Concept highlights recent advances in cooperative‐catalysis‐enabled reactions, focusing substrates, which difficult perform when well‐defined cationic Co I is employed.

Language: Английский

Citations

1
The Synthesis of O-Aminobenzoate Catalyzed by Iodine with S8 as an Oxidant DOI
Chenxi Huang,

Peilin Qi,

yujin li

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0