Synthesis and Applications of a New Epoxy-isoindolinone
摘要:
A new epoxy-isoindolinone was stereoselectively synthesized, and its reactions gave several interesting products including a new 6-azabicyclo[3.2.1]octane derivative.
Brønsted Acid Catalyzed Dearomatization by Intramolecular Hydroalkoxylation/Claisen Rearrangement: Diastereo‐ and Enantioselective Synthesis of Spirolactams
作者:Peng‐Fei Chen、Bo Zhou、Peng Wu、Binju Wang、Long‐Wu Ye
DOI:10.1002/anie.202113464
日期:2021.12.20
A Brønstedacidcatalyzedintramolecular hydroalkoxylation/Claisen rearrangement is disclosed that involves an unexpected dearomatization of nonactivated arenes and heteroaromatic compounds and allows the practical and atom-economic synthesis of various valuable spirolactams. Moreover, the asymmetric version of this tandem cyclization is also achieved via kinetic resolution by chiral phosphoric acid
The reaction of N-Ts-(2-bromophenyl)alkylamines with aldehydes in the presence of a catalytic amount of a rhodium complex results in the intramolecular aminocarbonylation of the aryl halides to give five-, six-, and seven-membered benzolactams.
Alkane- and arenesulfonyl isocyanates were added to benzocyclopropene across the C–C σ-bond of the three-membered ring, giving 2-sulfonyl-1-isoindolinones. The reaction with C,N-diphenylnitrone afforded a similar cyclization product, 3,4-dihydro-3,4-diphenyl-1H-2,3-benzoxazine. These reactions are considered to proceed through zwitterionic intermediates formed by the fission of the C–C σ-bond of the
2-oxazetidines with carboxylic aciddirected C–H activation in catalytic synthesis of isoindolinones is reported for the first time. This reaction opens a new and sustainable avenue to prepare a range of structurally diverse isoindolinone skeletons from readily available benzoicacids. The success of late-stage functionalization of some bioactive acids, and concise synthesis of biologically important skeletons
Ynamide Smiles Rearrangement Triggered by Visible-Light-Mediated Regioselective Ketyl–Ynamide Coupling: Rapid Access to Functionalized Indoles and Isoquinolines
作者:Ze-Shu Wang、Yang-Bo Chen、Hao-Wen Zhang、Zhou Sun、Chunyin Zhu、Long-Wu Ye
DOI:10.1021/jacs.9b13975
日期:2020.2.19
under mild reaction conditions. In addition, this chemistry can also be extended to the divergent synthesis of versatile 3-benzhydrylisoquinolines through similar ketyl-ynamide coupling and radical Smiles rearrangement, followed by dehydrogenative oxidation. Moreover, such an ynamide Smiles rearrangement initiated by intermolecular photoredox catalysis via addition of external radical sources is also