Cu(OTf)(2) and 1 equiv of a Brønstedacid, such as CF(2)HCO(2)H, in (CH(2)Cl)(2) at 100 degrees C, the decarbonylated naphthalene products 5 were obtained in high yields. Similarly, the Cu(OTf)(2)-H(2)O-promoted reaction of the enynals 7 with an alkyne 2 afforded the corresponding [4+2] benzannulation products, decarbonylated benzene derivatives 8, in good yields. Both AuX(3)- and Cu(OTf)(2)-catalyzed
The reaction of o-alkynylbenzaldehydes 1 and alkynes 2 in the presence of a catalytic amount of AuCl3 in (CH2Cl)2 at 80 degrees C gave naphthyl ketone products in high yields. The AuCl3-catalyzed formal [4 + 2] benzannulation proceeds most probably through the coordination of the triple bond of 1 to AuCl3, the formation of benzo[c]pyrylium auric ate complex via the nucleophilic addition of the carbonyl
Molecular iodine-mediated reaction of 2-(2-phenylethynyl)-Morita–Baylis–Hillman adducts: an easy route to naphthyl ketones and iodo-substituted isochromenes
作者:Donala Janreddy、Veerababurao Kavala、Trimurtulu Kotipalli、R. R. Rajawinslin、Chun-Wei Kuo、Wen-Chang Huang、Ching-Fa Yao
DOI:10.1039/c4ob00938j
日期:——
The iodine mediated reaction of 2-(2-phenylethynyl)-MBH gives corresponding naphthyl ketones and iodo-substituted isochromenes.
碘介导的2-(2-苯乙炔基)-MBH的反应会生成相应的萘酮和碘取代的异色烯。
A new route to naphthyl ketones via copper-mediated intramolecular aerobic oxidative cyclization of alkynes and sulfonylcrotonates
作者:Zhi-Qiang Wang、Kun Xu、Xu Zhang、Ting Li、Shao-Long Zheng、Lin-Tao Yu、Wu-Tao Mao、Chang-Zhong Chen、Li-Ya Wang
DOI:10.1039/c6ra23244b
日期:——
Herein we report a copper-mediated intramolecular aerobic oxidativecyclization of alkynes and sulfonylcrotonates. This method provides simple, efficient and easy to operate access to a variety of highly functionalized naphthyl ketones with excellent functional group tolerance.