697287-96-0Relevant academic research and scientific papers
Ni/AntPohs-Catalyzed Stereoselective Asymmetric Intramolecular Reductive Coupling of N-1,6-Alkynones
Chen, Wanjun,Cheng, Yaping,Zhang, Tao,Mu, Yu,Jia, Wenqi,Liu, Guodu
, p. 5166 - 5182 (2021/05/05)
An efficient nickel-catalyzed stereoselective asymmetric intramolecular reductive coupling of N-1,6-alkynones is reported. A P-chiral monophosphine ligand AntPhos was found to be a privileged catalyst for constructing versatile functionalized chiral pyrro
Thiyl radical-mediated cyclization of ω-alkynyl O-tert-butyldiphenylsilyloximes
Shibata, Nina,Tsuchiya, Takahisa,Hashimoto, Yoshimitsu,Morita, Nobuyoshi,Ban, Shintaro,Tamura, Osamu
supporting information, p. 3025 - 3034 (2017/04/10)
ω-Alkynyl O-tert-butyldiphenylsilyloximes, upon treatment with odorless 4-tert-butylbenzenethiol in the presence of azobisisobutyronitrile (AIBN) in refluxing benzene, underwent addition of a thiyl radical to the alkynyl group followed by radical cyclizat
Vinyl dihydropyrans and dihydrooxazines: Cyclizations of catalytic ruthenium carbenes derived from alkynals and alkynones
Cambeiro, Fermin,Lopez, Susana,Varela, Jesus A.,Saa, Carlos
, p. 5959 - 5963 (2014/06/10)
A novel synthesis of 2-vinyldihydropyrans and dihydro-1,4-oxazines (morpholine derivatives) from alkynals and alkynones has been developed. The cyclizations require a mild generation of catalytic ruthenium carbenes from terminal alkynes and (trimethylsilyl)diazomethane followed by trapping with carbonyl nucleophiles. Mechanistic aspects of the new cyclizations are discussed. Setting a trap: A novel synthesis of 2-vinyldihydropyrans and dihydro-1,4-oxazines (morpholine derivatives) from alkynals and alkynones has been developed. The cyclizations require a mild generation of catalytic ruthenium carbenes from terminal alkynes and (trimethylsilyl)diazomethane followed by trapping with carbonyl nucleophiles.
Silver(I)-Catalyzed conia-ene reaction: Synthesis of 3-pyrrolines via a 5-endo-dig cyclization
Boominathan, Siva Senthil Kumar,Hu, Wan-Ping,Senadi, Gopal Chandru,Wang, Jeh-Jeng
, p. 3570 - 3574 (2014/01/06)
A novel method has been developed for the synthesis of 3-pyrrolines from β-ketopropargylamines via a 5-endo-dig carbocyclization. This transformation involves a silver-catalyzed Conia-ene type reaction tolerating broad substrate scope with good to excellent yields. Furthermore, this methodology has been extended for the construction of 2-substituted pyrroles under base-mediated conditions. Copyright
Investigation of intramolecular Pauson-Khand reaction of 2-aryl-1,6- and 1-methyl-1,7-enynes (exo-olefins) and 1-phenyl-1-octen-7-yne (endoolefin)
Ishizaki, Miyuki,Satoh, Hiroshi,Hoshino, Osamu,Nishitani, Kiyoshi,Hara, Hiroshi
, p. 827 - 844 (2007/10/03)
The intramolecular Pauson-Khand reaction of various 2-aryl-1-hepten-6-ynes and its aza-derivatives (exo-olefins) efficiently produced arylbicyclo[3.3.0]octenones and azaoctenone bearing quaternary carbon centers at angular positions in good yields. Although a similar reaction of 2-phenyl-1-octen-7-yne (exo-olefin), which is a homologue of 2-phenyl-1-hepten-6-yne, did not take place, the reaction of the methyl derivatives smoothly proceeded. However, the reaction of regioisomeric 1-phenyl-1-octen-7-yne (endo-olefin) afforded the desired product in moderate yields.
