Au-Catalyzed Asymmetric Formal [3 + 2] Cycloaddition of Isocyanoacetates with Maleimides
作者:Silvia Padilla、Javier Adrio、Juan C. Carretero
DOI:10.1021/jo3003425
日期:2012.4.20
An efficient protocol for the Au-I-catalyzed asymmetric formal [3 + 2] cycloaddition of isocyanoacetates with phenylmaleimide has been developed. In the presence of cationic Au-I/DTBM-segphos complex, excellent diastereoselectivity and high levels of enantioselectivity (up to 97% cc) have been attained with a variety of alpha-substituted isocyanoacetates. The synthetic potential of the resulting enantioenriched 1-pyrrolines has been demonstrated by the preparation of highly substituted pyrrolidines bearing a quaternary stereocenter.
Intramolecular Imidoylative Heck Reaction: Synthesis of Cyclic Ketoimines from Functionalized Isocyanide
作者:Jian Wang、Shi Tang、Qiang Zhu
DOI:10.1021/acs.orglett.6b01174
日期:2016.7.1
Efficient access to five- to seven-membered cyclic ketoimines, through palladium-catalyzed intramolecular imidoylative Heckreaction of alkene-containing isocyanides, has been developed. Consecutive isocyanide and alkene insertion into aryl or alkyl Pd(II) intermediates takes place in this process. No byproduct derived from monoinsertion or reversed sequence is detected.
Aryl sulfonium salt electron donor-acceptor complexes for halogen atom transfer: Isocyanides as tunable coupling partners
作者:Huaibo Zhao、Valentina D. Cuomo、James A. Rossi-Ashton、David J. Procter
DOI:10.1016/j.chempr.2024.01.020
日期:2024.4
(electron donor-acceptor) complexes provides a mild platform for aryl-radical-mediated halogen atom transfer activation of a wide range of functionalized alkyl iodides, including tertiary alkyl iodides. Using an aryl sulfonium salt with carbonate as an inexpensive donor for EDA complex formation, the general reaction platform has been applied in a divergent, metal-free photochemical approach to nitriles