19947-80-9Relevant articles and documents
Electrochemically enabled rhodium-catalyzed [4 + 2] annulations of arenes with alkynes
Chen, Jia-Yi,Li, Ming,Li, Rui-Tao,Ma, Qiang,Ni, Shao-Fei,Wang, Zi-Chen,Wen, Li-Rong,Zhang, Lin-Bao
supporting information, p. 9515 - 9522 (2021/12/09)
Herein, electrochemically driven, Rh(iii)-catalyzed regioselective annulations of arenes with alkynes have been established. The strategy, combining the use of a rhodium catalyst with electricity, not only avoids the need for using a stoichiometric amount of external oxidant, but also ensures that the transformations proceed under mild and green conditions, which enable broad functional group compatibility with a variety of substrates, including drugs and pharmaceutical motifs. Moreover, the electrolysis reaction was made operationally simple by employing an undivided cell, and proceeds efficiently in aqueous solution in air. This journal is
Synthesis of pterocarpans through palladium-catalyzed oxyarylation of alkoxy-2H-chromenes with o-iodophenols
Gaspar, Francisco V.,Barcellos, Julio C.F.,Cívicos, José F.,Merino, Pedro,Nájera, Carmen,Costa, Paulo R.R.
, (2020/10/22)
The oxyarylation of alkoxy-2H-chromenes (1a-e) with o-iodophenols substituted by electron-withdrawing (CHO) and electron-donating (OMe) groups is studied under two experimental conditions: a) Pd(OAc)2, Ag2CO3 in PEG-400 at 140 °C, 10 min and b) oxime-based palladacycle, DIPEA, in PEG-400 at 150 °C, 3–4 h. Pterocarpans are obtained in moderate to good chemical yields.
Copper-Catalyzed Ring Opening of [1.1.1]Propellane with Alkynes: Synthesis of Exocyclic Allenic Cyclobutanes
Lasányi, Dániel,Tolnai, Gergely L.
supporting information, p. 10057 - 10062 (2019/12/24)
Despite the long history and interesting properties of propellanes, these compounds still have tremendous potential to be exploited in synthetic organic chemistry. Herein we disclose an experimentally simple procedure to achieve cyclobutane-containing allenes and alkynes through a copper-catalyzed ring opening of [1.1.1]propellane and subsequent reaction with ethynes.
