Highly Regio- and Stereoselective Synthesis of Multialkylated Olefins through Carbozirconation of Alkynylboronates and Sequential Negishi and Suzuki-Miyaura Coupling Reactions
作者:Yasushi Nishihara、Yoshiaki Okada、Jiao Jiao、Masato Suetsugu、Ming-Tzu Lan、Megumi Kinoshita、Masayuki Iwasaki、Kentaro Takagi
DOI:10.1002/anie.201103601
日期:2011.9.5
Two Nobel couplings: The synthesis of tri‐ and tetraalkylated olefins has been achieved (see scheme). These multialkylated olefins were prepared by the zirconocene‐mediated carbometalation of 1‐alkynylboronates and subsequent sequential CC bond formation with Negishi and Suzuki–Miyaura cross‐coupling reactions using β‐hydrogen‐containing alkylzinc reagents and alkyl electrophiles as coupling partners
两种诺贝尔偶联:三和四烷基化烯烃的合成已经完成(参见方案)。这些multialkylated烯烃是由1- alkynylboronates和随后的顺序C中的茂锆-介导的carbometalation制备与根岸和铃木-宫浦C键形成交联偶合反应使用β烷基锌试剂和亲电子烷基作为偶联含α-氢的。