Nickel-Catalyzed Cyclization of Difluoro-Substituted 1,6-Enynes with Organozinc Reagents through the Stereoselective Activation of CF Bonds: Synthesis of Bicyclo[3.2.0]heptene Derivatives
作者:Manabu Takachi、Yusuke Kita、Mamoru Tobisu、Yoshiya Fukumoto、Naoto Chatani
DOI:10.1002/anie.201004543
日期:2010.11.8
a gem: A nickel‐catalyzed cyclization of 1,6‐enynes, bearing a gem‐difluoro group at the olefinic terminus, with organozinc reagents gives the title compounds (see scheme). One of the fluorine atoms is stereoselectively replaced by the R′ group of R′2Zn, indicating the involvement of the stereoselective activation of a C–F bond.
相当宝石:用镍催化环化1,6-炔烃,在烯基末端带有宝石二氟基团,并用有机锌试剂可制得标题化合物(参见方案)。一个氟原子的立体选择性由R'基团R'的取代2的Zn,表示C-F键的立体选择性激活的参与。