Assembly of (E)‐γ‐Lactones Fused Five‐ or Six‐Membered Ring via Palladium‐Catalyzed Cascade Annulation Reaction

Chemistry - An Asian Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract A palladium‐catalyzed divergent cascade annulation reaction of unactivated cycloalkenes with alkynoic acids under aerobic conditions is accomplished. This catalytic protocol provides an efficient and economical strategy to accommodate a broad scope (E)‐ γ ‐lactones fused five‐ or six‐membered ring motifs good regioselectivities yields ( 57 examples, up 94 % yield E/Z 98 : 2 ). More importantly, the developed applicable wide array cycloalkenes, including cyclopentene, cyclohexa‐1,3‐diene, cyclohexa‐1,4‐diene, cyclohepta‐1,3‐diene conjugated 1,3‐diene.

Language: Английский

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Rhodium(III)-catalyzed selective C−H olefination and desilylative vinylation of acyclic enamides with vinylsilanes

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 116051 - 116051

Published: March 1, 2025

Language: Английский

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Rhodium catalysts supported on phosphorus-rich covalent organic polymers for sustainable hydrosilylation of alkynes

Organic & Biomolecular Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Heterogeneous rhodium catalysts supported on phosphorus-rich covalent organic polymers provide a sustainable solution to the scarcity of Rh resources in chemical industry.

Language: Английский

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Palladium‐Catalyzed Denitrogenative Coupling of Aryldiazonium Salts with Terminal Alkynes for the Assembly of Internal Alkynes

European Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 27(40)

Published: July 11, 2024

Abstract An N‐heterocyclic carbene palladium (NHC‐palladium)‐catalyzed denitrogenative coupling of aryldiazonium salts with terminal alkynes in ionic liquids has been accomplished. This catalytic strategy provides an effective and green synthetic protocol for the assembly structurally diverse internal excellent functional group compatibility mild conditions. In presence 1 mol % IMes‐Pd‐Im‐Cl 2 as catalyst, a wide range could be excellently tolerated. Basic liquid plays crucial role this system, which not only acts solvent, but also basic environment carbon‐carbon bond formation process. Notably, system recycled up to six times reused without significant loss activity.

Language: Английский

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Unsaturated organosilanes: synthesis, transformations and applications

Russian Chemical Reviews, Journal Year: 2024, Volume and Issue: 93(11), P. RCR5140 - RCR5140

Published: Oct. 30, 2024

The urgency of improving the efficiency known methods and developing new ones for synthesis unsaturated silanes is caused by need to obtain useful compounds, including biologically active ones, on their basis. This review considers preparation silanes, transformations prospects use as precursors in organic organoelement synthesis. A large number substituted organosilicon products are given, those capable further functionalization formation heterocycles, silaheterocycles.<br> bibliography includes 205 references.

Language: Английский

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