3972-25-6Relevant articles and documents
Wolfe et al.
, p. 3402 (1968)
Cram,Rickborn
, p. 2178,2182 (1961)
Cohen,Aktipis
, p. 3587,3594 (1966)
Copper-catalyzed synthesis of CN-containing chroman-4-ones via intramolecular radical cascade acyl-cyanation reaction
Wang, Liang,Jiang, Min,Shi, Ming-qi
, (2021)
A copper-catalyzed intramolecular radical cascade acyl-cyanation to synthesize cyano-containing chroman-4-ones has been developed. A series of CN-substituted chroman-4-one derivatives can be prepared with moderate to good yields using green cyano source under mild conditions. Control experiments indicated this reaction involved an intramolecular acyl radical addition/cyanation process. Moreover, this protocol features step- and atom-economy, and the introduction of cyano group into the chroman-4-one is of great interest and importance.
Photolysis of solutions of 3-terf-butylperoxy-3-methyl-1-butyne
Shutova,Skakovskii,Agabekov,Murashko,Dikusar
, p. 627 - 632 (2001)
Photolysis of solutions of 3-tert-butyl-3-methyl-1-butyne in CD3OD and C6D12 was studied by means of 1H NMR spectroscopy, chemical nuclear polarization of the reaction products in the range 213-333 K, and kinetic measurements. It is shown that 3-tert-butyl-3-methyl-1-butyne decomposes primarily from a singlet electronic state. A scheme is proposed of the most probable reactions involving the radicals formed and solvent molecules. It is found that secondary processes play an important role in the initiation of the chemical nuclear polarization and the photolysis mechanism.
Phosphonium Phenolate Zwitterion vs Phosphonium Ylide: Synthesis, Characterization and Reactivity Study of a Trimethylphosphonium Phenolate Zwitterion
Xiao, Jing,Li, Qiang,Shen, Ruwei,Shimada, Shigeru,Han, Li-Biao
supporting information, p. 5715 - 5720 (2019/11/22)
4-Methoxy-3-(trimethylphosphonio)phenolate was obtained from a regioselective addition of PMe3 to p-quinone monoacetal. This compound undergoes hydrogen isotope exchange with D2O or CD3CN, and is capable of catalyzing H/D exchange of CD3CN with substrates bearing weakly acidic hydrogens. It exhibits similar reactivity to phosphorus ylides for olefinations of aldehydes. A possible tautomerization between the phosphonium phenolate zwitterion and phosphonium ylide is proposed for the first time to rationalize the unique reactivity.