69042-21-3Relevant articles and documents
Transition-Metal-Free Synthesis of Pyridine Derivatives by Thermal Cyclization of N -Propargyl Enamines
Chikayuki, Yuya,Higashiyama, Kimio,Kirita, Akiko,Matsuo, Natsuko,Miyashige, Takakane,Sasaki, Shigeru,Teramoto, Hiroyoshi,Yamauchi, Takayasu,Yonekawa, Shiori
, p. 1113 - 1121 (2020/04/01)
A transition-metal-free synthesis of pyridine derivatives by 6- endo - dig cyclization of N -propargyl enamines was developed. This method is environmentally friendly and is a high atom economy reaction that is easily accessed to provide pyridine derivatives in moderate to good yield by heating N -propargyl enamines in solvent without additives. The total synthesis of onychine was achieved in 51% yield in only two steps by using this method.
Formation of bicyclic pyrroles and furans through an enone allene photocycloaddition and fragmentation sequence
Lutteke, Ginger,Alhussainy, Rana,Wrigstedt, Pauli J.,Hue, B. T. Buu,De Gelder, Rene,Van Maarseveen, Jan H.,Hiemstra, Henk
experimental part, p. 925 - 933 (2009/04/04)
The [2+2] photocycloaddition of allenes 15-18, 23 and 26 was studied. Irradiation of a solution of these substrates in acetonitrile at 300 nm resulted in the clean conversion of the starting materials into a mixture of photoproducts. The major product in
Intramolecular photoaddition of vinylogous amides with allenes: A novel approach to the synthesis of pyrroles
Winkler, Jeffrey D.,Ragains, Justin R.
, p. 4031 - 4033 (2007/10/03)
Irradiation of vinylogous amide or imide 5 (R = H, alkyl, or Ac) leads to the selective formation of either crossed photoadduct 7 (R = Ac) or parallel photoadduct 8 (R = H or alkyl) as a function of the nature of the group R. The latter result leads to a
