Nucleophilic Phosphine-Catalyzed Intramolecular Michael Reactions of <i>N</i>-Allylic Substituted α-Amino Nitriles: Construction of Functionalized Pyrrolidine Rings via 5-<i>endo</i>-trig Cyclizations
作者:Da En、Gong-Feng Zou、Yuan Guo、Wei-Wei Liao
DOI:10.1021/jo500418s
日期:2014.5.16
Pyrrolidine rings are common moieties for pharmaceutical candidates and natural compounds, and the construction of these skeletons has received much attention. α-Amino nitriles are versatile intermediates in synthetic chemistry and have been widely used in the generation of multiple polyfunctional structures. Herein, a novel nucleophilic phosphine-catalyzed intramolecularMichaelreaction of N-allylic
The directamination of cyanohydrins with amines via a catalytic cyano-borrowing reaction was developed. The transformation features broad substrate scope, excellent functional group compatibility, and very mild and simple operations. Moreover, a titanium catalyst supported by quinine and (S)-BINOL ligands enabled an asymmetric cyano-borrowing reaction with moderate to high enantioselectivity.
Controllable Lewis Base Catalyzed Michael Addition of α-Aminonitriles to Activated Alkenes: Facile Synthesis of Functionalized γ-Amino Acid Esters and γ-Lactams
作者:Zhong-Lin Wei、Wei-Wei Liao、Ze-Ying He、Ho-Chol Jang、Le-Sheng Teng
DOI:10.1055/a-1337-4684
日期:2021.5
A novel protocol for the synthesis of functionalized γ-amino acid esters and γ-lactams through a controllable Lewis base catalyzed Michael addition of α-aminonitriles to simple activated alkenes has been developed. The scope, versatility, and efficiency of the process were demonstrated.