Carboamination of Unactivated Alkenes through Three‐Component Radical Conjugate Addition
作者:Heng Jiang、Gesa Seidler、Armido Studer
DOI:10.1002/anie.201910926
日期:2019.11.11
Giese type radicaladditions are highly practical and established reactions. Herein, three-component radical conjugate additions of unactivated alkenes to Michael acceptors are reported. Amidyl radicals, oxidatively generated from α-amido oxy acids using redox catalysis, act as the third reaction component which add to the unactivated alkenes. The adduct radicals engage in Giese type additions to Michael
Transition‐Metal‐Free Three‐Component Radical 1,2‐Amidoalkynylation of Unactivated Alkenes
作者:Heng Jiang、Armido Studer
DOI:10.1002/chem.201805490
日期:——
A transition‐metal‐freeradical 1,2‐amidoalkynylation of unactivated alkenes is presented. α‐Amido‐oxy acids were used as amidyl radical precursors, which were oxidized by an organic photoredox catalyst (4CzlPN). The electrophilic N‐radicals chemoselectively reacted with various aliphatic alkenes and the adduct radicals were then trapped by ethynylbenziodoxolone (EBX) reagents to eventually provide
Amidyl Radicals by Oxidation of α‐Amido‐oxy Acids: Transition‐Metal‐Free Amidofluorination of Unactivated Alkenes
作者:Heng Jiang、Armido Studer
DOI:10.1002/anie.201804966
日期:2018.8.13
three‐component transition‐metal‐free amidofluorination of unactivated alkenes and styrenes is presented. α‐Amido‐oxy acids are introduced as efficient and easily accessible amidyl radical precursors that are oxidized by a photoexcited organic sensitizer (Mes‐Acr‐Me) to the corresponding carboxyl radical. Sequential CO2 and aldehyde/ketone fragmentation leads to an N‐centered radical that adds to an
6-tetrakis(2,7-dibromo-9H-carbazol-9-yl)isophthalonitrile (2,7-Br-4CzIPN) as a new photosensitizer for the energy-transfer-driven N–O bond dissociation of oximeesters. In the presence of 2,7-Br-4CzIPN, difunctionalization of alkenes with oximeesters, including oxyimination, aminocarboxylation, and amidylimination, could afford a variety of versatile molecules in good yields with excellent regioselectivity
我们开发了 2,4,5,6-四(2,7-二溴-9 H -咔唑-9-基)间苯二甲腈 (2,7-Br-4CzIPN) 作为能量转移驱动 N- 的新型光敏剂肟酯的 O 键解离。在 2,7-Br-4CzIPN 的存在下,烯烃与肟酯的双官能化,包括氧化亚胺化、氨基羧化和酰胺基化,可以以良好的产率和优异的区域选择性提供多种多功能分子,广泛存在于天然产物和药物中。我们的理论研究和实验表明,2,7-Br-4CzIPN 具有独特的光物理性质、良好的三线态能量和优异的光催化活性。
AMIDINE SUBSTITUTED BETA-LACTAM COMPOUNDS, THEIR PREPARATION AND USE AS ANTIBACTERIAL AGENTS
申请人:AiCuris GmbH & Co. KG
公开号:US20170100379A1
公开(公告)日:2017-04-13
The present invention relates to novel β-lactam compounds, their preparation and use. In particular, this invention relates to novel β-lactam compounds which are amidine substituted monobactam derivatives useful as antimicrobial agents and their preparation.