Carbon−Carbon Bond Cleavage of Diynes through the Hydroamination with Transition Metal Catalysts
作者:Tomohiro Shimada、Yoshinori Yamamoto
DOI:10.1021/ja034105o
日期:2003.6.1
The C-Cbondcleavage of terminal and internal diynes takes place readily in the presence of catalytic amounts of Ru3(CO)12 or Pd(NO3)2 and of 2-aminophenol, giving the corresponding benzoxazoles and ketones in good to high yields. There are two different modes of the bondcleavage: (a) an alkyne C-C triple bond is cleaved, and (b) the C-C single bond between the two alkyne groups is cleaved.
在催化量的 Ru3(CO)12 或 Pd(NO3)2 和 2-氨基苯酚存在下,末端和内部二炔的 CC 键断裂很容易发生,从而以良好或高产率得到相应的苯并恶唑和酮。有两种不同的键断裂模式:(a) 炔烃 CC 三键断裂,和 (b) 两个炔基之间的 CC 单键断裂。
User-Friendly [(Diglyme)NiBr<sub>2</sub>]-Catalyzed Direct Alkylations of Heteroarenes with Unactivated Alkyl Halides through CH Bond Cleavages
作者:Lutz Ackermann、Benudhar Punji、Weifeng Song
DOI:10.1002/adsc.201100487
日期:2011.12
A nitrogen and phosphorus ligand-free catalytic system derived from inexpensive [(diglyme)NiBr2] allowed for efficient direct CH bondalkylations of heteroarenes with unactivated β-hydrogen-containing alkylhalides under basic reaction conditions.