Transition Metal-Catalyzed Synthesis and Reactivity of <i>N</i>-Alkenyl Aziridines
作者:Shadi Dalili、Andrei K. Yudin
DOI:10.1021/ol050094n
日期:2005.3.1
aziridines with alkenyl halides and copper-catalyzed alkenylation of aziridines with alkenyl boronic acids have been developed. This methodology offers attractive alternatives to the known methods requiring activated alkenyl halides and acetylenes. A wide variety of N-alkenyl aziridines containing substituents other than electron-withdrawing substituents such as cyano groups and sulfones have been synthesized
Persistent radical meets enolates: Catecholboron ketone enolates are oxidized efficiently under mild conditions by treatment with the persistent TEMPO radical. Catecholboron enolates are readily prepared by 1,4‐reduction of α,β‐unsaturated ketones or by transmetalation of silyl enol ethers and zinc enolates with chlorocatecholboranes. Enolate formation and oxidation can be performed as a one‐pot process
Preparation of β-hydroxyketones (aldols) from the alkylation of O-silyl aryl cyanohydrins with epoxides
作者:Lissa D. Gilreath、Diamond R. Melendez、Caylie A. McGlade、Jennifer E. Shoemaker、Dakoda W. Mullinax、Aaron M. Hartel
DOI:10.1016/j.tetlet.2022.154334
日期:2023.2
β-Hydroxyketones (aldols) are prepared from the alkylation-deprotection of O-silylated aryl cyanohydrins with epoxides. Key to the success of the method was the suppression of an in situ cyclic imidate formation that occurs upon initial opening of the epoxide ring.
Oxidative Cycloamination of Olefins with Aziridines as a Versatile Route to Saturated Nitrogen-Containing Heterocycles
作者:Mikio Sasaki、Andrei K. Yudin
DOI:10.1021/ja037726q
日期:2003.11.1
Highly reactive [5,3] and [6,3] bicyclic aziridines can be readily prepared from the corresponding NH aziridines and N-bromosuccinimide by intramolecular oxidative cycloamination of olefins. These compounds, including surprisingly stable exo-methylene bicyclic aziridines, provide versatile synthetic entries into a wide range of pyrrolidine- and piperidine-containing heterocycles.