Photocyclisations of 1,4-diarylbut-1-en-3-ynes. Part III. Scope and limitations of the reaction
作者:Alois H. A. Tinnemans、Wim H. Laarhoven
DOI:10.1039/p29760001115
日期:——
The photoreactivity of a large series of diarylbutenynes has been studied in order to establish the scope of this photocyclisationreaction. The conditions for an optimal yield of photocyclisation products are discussed. On addition of iodine to the butenyne solution, irradiation gives rise to iodo-derivatives of the normal cyclisation products, whereas in the presence of iodine and with benzene as
Gold-Catalyzed Cyclization of Alkynyl Heteroarenes with a Norbornene Bridge
作者:Jung Min Joo、Ju Eun Jeon、Siyeon Jeong、Hayeon Kwak
DOI:10.1055/a-2039-5521
日期:——
(hetero)arenes with the norbornene bridge installed at the more electron-rich and sterically demanding position underwent a rearrangement to afford the corresponding regioisomeric products in a divergent manner. The results indicate that the rigid norbornene ring creates a steric effect, in addition to placing two reactive sites in close proximity and serving as an acetylene synthon. This illustrates the