Copper-Catalyzed Cross-Coupling of Nonactivated Secondary Alkyl Halides and Tosylates with Secondary Alkyl Grignard Reagents
作者:Chu-Ting Yang、Zhen-Qi Zhang、Jun Liang、Jing-Hui Liu、Xiao-Yu Lu、Huan-Huan Chen、Lei Liu
DOI:10.1021/ja304848n
日期:2012.7.11
Practical catalytic cross-coupling of secondary alkyl electrophiles with secondary alkyl nucleophiles under Cu catalysis has been realized. The use of TMEDA and LiOMe is critical for the success of the reaction. This cross-coupling reaction occurs via an S(N)2 mechanism with inversion of configuration and therefore provides a general approach for the stereocontrolled formation of C-C bonds between
已经实现了在铜催化下仲烷基亲电试剂与仲烷基亲核试剂的实际催化交叉偶联。TMEDA 和 LiOMe 的使用对于反应的成功至关重要。这种交叉偶联反应通过构型反转的 S(N)2 机制发生,因此为手性仲醇的两个叔碳之间立体控制形成 CC 键提供了通用方法。
An Introverted Bis-Au Cavitand and Its Catalytic Dimerization of Terminal Alkynes
作者:Naoki Endo、Mao Kanaura、Michael P. Schramm、Tetsuo Iwasawa
DOI:10.1002/ejoc.201600362
日期:2016.5
oriented phosphoramidite-Au dinuclear resorcinarene cavitand complex is described, including a description of potent catalytic abilities. The cavitand structure was determined by crystallographic analysis, which revealed that the phosphoramidite P–N bonds point outside placing the two Au atoms inside. We explored the catalytic proclivity of the cavitand and found that it effeciently catalyzes selective
描述了一种向内定向的亚磷酰胺-Au 双核间苯二酚腔复合物的制备合成,包括对有效催化能力的描述。通过晶体学分析确定了空腔结构,这表明亚磷酰胺 P-N 键指向外部,将两个 Au 原子置于内部。我们探索了腔体的催化倾向,发现它可以有效地催化末端炔烃的选择性和直接二聚化以提供共轭烯炔。混合二聚产生化学选择性产物,分子内二聚的大环化都是该方法的标志性能力。
Metal-promoted cyclization. 28. Regioselective and diastereoselective alkyl-alkene and alkene-alkene coupling promoted by zirconocene and hafnocene
作者:Douglas R. Swanson、Christophe J. Rousset、Eiichi Negishi、Tamotsu Takahashi、Takashi Seki、Masahiro Saburi、Yasuzo Uchida