Regioselective (Diacetoxyiodo)benzene-Promoted Halocyclization of Unfunctionalized Olefins
作者:Gong-Qing Liu、Yue-Ming Li
DOI:10.1021/jo501739j
日期:2014.11.7
A metal-free method for intramolecular halocyclization of unfunctionalizedolefins was detailed. (Diacetoxyiodo)benzene (PIDA) was very effective for haloamidation, haloetherification, and halolactonization of unfunctionalizedolefins. In the presence of 1.1 equiv of PIDA and suitable halogen sources, a variety of unfunctionalizedolefins could be converted to the corresponding 1,2-bifunctional cyclic
Palladium(II)‐Catalyzed Enantioselective Azidation of Unactivated Alkenes
作者:Xiaonan Li、Xiaoxu Qi、Chuanqi Hou、Pinhong Chen、Guosheng Liu
DOI:10.1002/anie.202006757
日期:2020.9.21
of unactivated alkenes has been established by using readily accessible 1‐azido‐1,2‐benziodoxol‐3(1H)‐one (ABX) as an azidating reagent, which affords a wide variety of structurally diverse 3‐N3‐substituted piperidines in good yields with excellent enantioselectivity. The reaction features good functional‐group compatibility and mild reaction conditions. Notably, both an electrophilic azidating reagent
Copper-Catalyzed Enantioselective Aerobic Alkene Aminooxygenation and Dioxygenation: Access to 2-Formyl Saturated Heterocycles and Unnatural Proline Derivatives
作者:Raul L. L. Carmo、Samuel L. Galster、Tomasz Wdowik、Chaeeon Song、Sherry R. Chemler
DOI:10.1021/jacs.3c01985
日期:2023.6.28
Alkeneaminooxygenation and dioxygenation reactions that result in carbonyl products are uncommon, and protocols that control absolute stereochemistry are rare. We report herein catalytic enantioselective alkeneaminooxygenation and dioxygenation that directly provide enantioenriched 2-formyl saturated heterocycles under aerobic conditions. Cyclization of substituted 4-pentenylsulfonamides, catalyzed