Radical Heterocyclization and Heterocyclization Cascades Triggered by Electron Transfer to Amide-Type Carbonyl Compounds
作者:Huan-Ming Huang、David J. Procter
DOI:10.1002/anie.201708354
日期:2017.11.6
Radical heterocyclizations triggered by electron transfer to amide‐type carbonyls, using SmI2‐H2O, provide straightforward access to bicyclic heterocyclic scaffolds containing bridgehead nitrogen centers. Furthermore, the first radical heterocyclization cascade triggered by reduction of amide‐type carbonyls delivers novel, complex tetracyclic architectures containing five contiguous stereocenters with
Copper-Catalyzed Diastereoselective Synthesis of Trifluoromethylated Tetrahydrofurans
作者:Yanan Wang、Min Jiang、Jin-Tao Liu
DOI:10.1002/adsc.201501166
日期:2016.4.14
The copper‐catalyzed intramolecular diastereoselective trifluoromethylcycloetherification of homoallylic alcohols with Togni’s reagent as trifluoromethylating reagent was realized under mild conditions. Various trifluoromethylated tetrahydrofurans were synthesized in moderate to good yields. Moreover, a wide range of common functional groups was tolerated.
Reductive cyclisations of amidines involving aminal radicals
作者:Huan-Ming Huang、Ralph W. Adams、David J. Procter
DOI:10.1039/c8cc05178j
日期:——
Amidines bearing simple alkenes undergo aminal radicalcyclisation upon treatment with SmI2. The mild, reductive electron transfer process delivers medicinally-relevant, polycyclic quinazolinone derivatives in good to excellent yield and typically with complete diastereocontrol.
In contrast to almost all of the known examples of Heck arylation of unsaturated alcohols, which yield predominately β-arylated products, arylation under the Pd-DPPP catalysis in ionic liquid leads preferentially to aryl substitution at the α carbon, providing an easy pathway to this valuable class of olefins.
Catalytic Enantioselective Aminative Difunctionalization of Alkenes
作者:Nan Huang、Jie Luo、Lihao Liao、Xiaodan Zhao
DOI:10.1021/jacs.4c00307
日期:2024.3.13
hydrazine derivatives via either [3 + 2] cycloaddition or intramolecular cyclization have been achieved in high chemo-, regio-, enantio-, and diastereoselectivities. In this transformation, a wide range of functional groups, such as carboxylic acid, hydroxy, amide, sulfonamide, and aryl groups, could serve as nucleophiles. Importantly, a new cyano oxazoline chiral ligand was found to play a crucial role