Heteroarylation of Organophosphonium Salts with Indoles in Water: Synthesis of Symmetrical and Unsymmetrical 3,3'‐Bisindolylmethane Derivatives

European Journal of Organic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Окт. 16, 2024

Abstract A method for the synthesis of symmetrical and unsymmetrical 3,3′‐bis(indolyl)methanes (3,3′‐BIMs) has been developed through direct heteroarylation indolyl‐containing di(hetero)aryl phosphonium salts with indole derivatives in aqueous media. This metal‐free reaction proceeds smoothly under mild conditions, eliminating need hazardous solvents expensive additives/catalysts typically used conventional routes, thereby highlighting synthetic practicality efficiency process. The success this approach is largely attributed to role water as a promoter, facilitating C−P bond functionalization salts. Furthermore, demonstrates broad substrate scope, good functional group tolerance, excellent scalability. Moreover, protocol can also be extended triindolylmethane compound diarylmethylated indole.

Язык: Английский

Enantioselective Synthesis of Axially Chiral Allylic Nitriles via Nickel‐Catalyzed Desymmetric Cyanation of Biaryl Diallylic Alcohols

Angewandte Chemie, Год журнала: 2024, Номер unknown

Опубликована: Окт. 18, 2024

Abstract Axially chiral nitriles are common motifs in organic photoelectric materials, biological compounds, and agrochemicals. Unfortunately, the limited synthetic approaches to axially have impeded their availability. Herein, we report first nickel‐catalyzed desymmetric allylic cyanation of biaryl alcohols for synthesis nitrile structures high yields with excellent enantioselectivities (up 90 % yield >99 ee ). This process enables a diverse range bearing β , γ ‐unsaturated alcohol moieties. Leveraging cyano groups as versatile functionalization handles allow further derivatization these frameworks. Density functional theory (DFT) calculations suggest that both steric electronic interactions play crucial roles determining enantioselectivity this transformation. Moreover, mild facile protocol is also applicable gram‐scale preparation nitriles.

Язык: Английский

Enantioselective Synthesis of Axially Chiral Allylic Nitriles via Nickel‐Catalyzed Desymmetric Cyanation of Biaryl Diallylic Alcohols

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Окт. 18, 2024

Axially chiral nitriles are common motifs in organic photoelectric materials, biological compounds, and agrochemicals. Unfortunately, the limited synthetic approaches to axially have impeded their availability. Herein, we report first nickel-catalyzed desymmetric allylic cyanation of biaryl alcohols for synthesis nitrile structures high yields with excellent enantioselectivities (up 90 % yield >99 ee). This process enables a diverse range bearing β,γ-unsaturated alcohol moieties. Leveraging cyano groups as versatile functionalization handles allow further derivatization these frameworks. Density functional theory (DFT) calculations suggest that both steric electronic interactions play crucial roles determining enantioselectivity this transformation. Moreover, mild facile protocol is also applicable gram-scale preparation nitriles.

Язык: Английский