Co(II)/Ag(I) Synergistically Catalyzed Monoinsertion Reaction of Isocyanide to Terminal Alkynes with H<sub>2</sub>O: Synthesis of Alkynamide Derivatives
作者:Rong Zhang、Zheng-Yang Gu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.orglett.8b02516
日期:2018.9.7
with terminal alkyne and water to afford alkynamide derivatives is reported. The insertion of monoisocyanide into the C–H bond of terminal alkynes is an efficient, straightforward, atom-economical route to alkynamides, which are useful synthons in organic synthesis. This synergistic process achieves the cleavage of a C–H bond and the construction of new C–C and C═O bonds under mild conditions through the
Access to 3‐(2‐Oxoalkyl)‐azaspiro[4.5]trienones
<i>via</i>
Acid‐Triggered Oxidative Cascade Reaction through Alkenyl Peroxide Radical Intermediate
作者:Chang‐Sheng Wang、Thierry Roisnel、Pierre H. Dixneuf、Jean‐François Soulé
DOI:10.1002/adsc.201801203
日期:2019.2
Azaspiro[4.5]trienones bearingketone side chains at the 3‐position are prepared from N‐alkyl‐arylpropiolamides and ketones via oxidative 1,2‐difunctionalization of alkynes. The cascade sequence starts with the generation of alkenyl peroxide intermediates, which are obtained by addition of tert‐butyl hydroperoxide to ketones in presence of a catalytic amount of a strong acid. Then, the ketone radical adds to
Bischler–Napieralski Synthesis of 6-Alkynyl Phenanthridines Based on Tf<sub>2</sub>O-Promoted Electrophilic Activation of <i>N</i>-Aryl-2-propynamides
作者:Lidong Shan、Hongchen Li、Lin Min、Yunxiang Weng、Xinyan Wang、Yuefei Hu
DOI:10.1021/acs.joc.1c01543
日期:2021.11.5
An efficient method for the synthesis of 6-alkynyl phenanthridines was developed. The method offered the first example to use 2-propynamides as substrates in the Bischler–Napieralskireaction and to create alkynylnitrilium triflates as new active intermediates in organic synthesis.
(<i>Z</i>)-Selective anti-Markovnikov or Markovnikov thiol–yne-click reactions of an internal alkyne by amide hydrogen bond control
作者:Milan Pramanik、Khokan Choudhuri、Subhayan Chakraborty、Arindam Ghosh、Prasenjit Mal
DOI:10.1039/d0cc00702a
日期:——
Herein, we show exclusive control of stereo and regioselective thiol-yne click (TYC) reactions of internal alkynes via amide hydrogenbondcontrol. By exploiting appropriate hydrogenbonding interactions like N-HS, N-HN and C-HO, either (Z)-selective anti-Markovnikov or Markovnikov products could be obtained for an internal alkyne, exclusively.
Fe(III)-Catalyzed Tandem Cyclization of Phenylpropiolamides with 3-Formylchromones for the Construction of 2-Pyridones
作者:Hyo Seon Sim、Hari Datta Khanal、Yong Rok Lee
DOI:10.1021/acs.joc.2c01459
日期:2022.10.7
atom-economic iron(III)-catalyzed three-component heteroannulation reaction between phenylpropiolamides, 3-formylchromones, and water is described for the construction of diversely multifunctionalized 2-pyridones. This protocol allows rapidaccess to a variety of 2-pyridones bearing an ortho-hydroxybenzoyl and a benzoyl scaffold under operationally simple conditions. The synthetic utility of the synthesized 2-pyridone