Synthesis of (difluoromethyl)naphthalenes using the ring construction strategy: C–C bond formation on the central carbon of 1,1-difluoroallenes <i>via</i> Pd-catalyzed insertion
作者:Kohei Fuchibe、Shumpei Watanabe、Go Takao、Junji Ichikawa
DOI:10.1039/c9ob00540d
日期:——
The insertion of 1,1-difluoroallenes was carried out to form a C–C bond exclusively on their central carbon. o-Bromophenyl-bearing 1,1-difluoroallenes underwent intramolecular insertion in the presence of a palladium catalyst. Regioselective C–C bond formation occurred to form a six-membered carbocycle, leading to pharmaceutically and agrochemically promising difluoromethylated naphthalenes.
进行1,1-二氟丙二烯的插入仅在其中心碳上形成CC键。在钯催化剂的存在下,使含邻溴苯基的1,1-二氟丙二烯进行分子内插入。区域选择性C–C键的形成形成了一个六元碳环,从而导致了药学和农业化学上有希望的二氟甲基化萘。