A New Efficient Synthesis of Pyranoquinolines from 1-Acetyl N-Aryl Cyclopentanecarboxamides
摘要:
A new efficient synthesis of pyrano[2,3-b]quinoline derivatives is developed via the H2SO4-mediated tandem cyclization/ring-opening/recyclization reaction of readily available 1-acetyl N-aryl cyclopentanecarboxamides, during which a novel ring-cleavage fashion of the cyclopentane unit is involved and possible mechanisms are discussed.
Facile and efficient synthesis of spiro-fused dihydrofuran-3(2H)-ones was developed via phenyliodine(III) diacetate (PIDA) mediated oxidative cyclization of 1-alkenoyl-1-carbamoyl cycloalkanes under very mild conditions.
A New Efficient Synthesis of Pyranoquinolines from 1-Acetyl <i>N</i>-Aryl Cyclopentanecarboxamides
作者:Qian Zhang、Zhiguo Zhang、Zihong Yan、Qun Liu、Tunyu Wang
DOI:10.1021/ol701536q
日期:2007.8.1
A new efficient synthesis of pyrano[2,3-b]quinoline derivatives is developed via the H2SO4-mediated tandem cyclization/ring-opening/recyclization reaction of readily available 1-acetyl N-aryl cyclopentanecarboxamides, during which a novel ring-cleavage fashion of the cyclopentane unit is involved and possible mechanisms are discussed.
Formal [4+1] annulation of α,α-dialkyl β-oxo amides and dimethylsulfoxonium methylide: a synthetic route to β-hydroxy-γ-lactams
A facile and efficient one-pot synthesis of β-hydroxy-γ-lactams from α,α-dialkyl β-oxo amides and trimethylsulfoxonium iodide in the presence of sodium hydride via a tandem CoreyâChaykovsky reaction and an intramolecular lactamization process is developed.