含杂原子的阶梯型π共轭分子的合成通过钯催化的分子内氧化性下成功地实现了 H / C ħ交叉偶联反应。该反应提供了各种带有杂原子(例如氮,氧,磷和硫原子)和羰基的π共轭分子。π共轭分子有效地合成,即使在克规模,以及较大的π共轭分子也由双C所得 H / C ħ交叉偶联反应和连续氧化cycloaromatization。
Transition metal complexes of N-heterocyclic carbenes, method of preparation and use in transition metal catalyzed organic transformations
申请人:Organ G. Michael
公开号:US20070073055A1
公开(公告)日:2007-03-29
The present invention relates to catalysts of transition metal complexes of N-heterocyclic carbenes, their methods of preparation and their use in chemical synthesis. The synthesis, ease-of-use, and activity of the compounds of the present invention are substantial improvements over in situ catalyst generation. Further, the transition metal complexes of N-heterocyclic carbenes of the present invention may be used as precatalysts in metal-catalyzed cross-coupling reactions.
Biaryls Made Easy: PEPPSI and the Kumada-Tamao-Corriu Reaction
作者:Michael G. Organ、Mirvat Abdel-Hadi、Stephanie Avola、Niloufar Hadei、Joanna Nasielski、Christopher J. O'Brien、Cory Valente
DOI:10.1002/chem.200601360
日期:2007.1
Initiation) precatalysts 1 and 2 is detailed. The ease-of-use of these catalysts and the synthesis of a wide range of hinderedbiaryls, large coupling partners and drug-like heterocycles, in high yield, makes the PEPPSI-KTC protocol very attractive. The high reactivity of the PEPPSI system allowed a tetra-ortho-substituted heterocycle, 11 to be synthesized at room temperature for the first time using any
palladium‐catalyzed intramolecularoxidativeCH/CH cross‐couplingreaction. This reaction provides a variety of π‐conjugated molecules bearing heteroatoms, such as nitrogen, oxygen, phosphorus, and sulfur atoms, and a carbonyl group. The π‐conjugated molecules were synthesized efficiently, even in gram scale, and larger π‐conjugated molecules were also obtained by a double CH/CH cross‐couplingreaction and successive
含杂原子的阶梯型π共轭分子的合成通过钯催化的分子内氧化性下成功地实现了 H / C ħ交叉偶联反应。该反应提供了各种带有杂原子(例如氮,氧,磷和硫原子)和羰基的π共轭分子。π共轭分子有效地合成,即使在克规模,以及较大的π共轭分子也由双C所得 H / C ħ交叉偶联反应和连续氧化cycloaromatization。