Pd(II)/Ag(I)-Promoted One-Pot Synthesis of Cyclic Ureas from (Hetero)Aromatic Amines and Isocyanates
作者:So Won Youn、Yi Hyun Kim
DOI:10.1021/acs.orglett.6b03151
日期:2016.12.2
A simple and facile one-pot reaction has been developed to afford a diverse range of N,N′-disubstituted benzimidazolones and imidazopyridinones containing two differently substituted N atoms. A cooperative Pd(II)/Ag(I) system promotes the sequential addition/intramolecular C–H amidationreaction of (hetero)aromatic amines and isocyanates, leading to the formation of two C–N bonds. A mechanism involving
已经开发出一种简单且容易的一锅反应,以提供包含两个不同取代的N原子的N,N'-二取代的苯并咪唑酮和咪唑并吡啶并酮的不同范围。协同的Pd(II)/ Ag(I)系统促进了(杂)芳族胺和异氰酸酯的顺序加成/分子内CH-H酰胺化反应,导致形成两个C-N键。一种机制,涉及在Ag 2 CO 3氧化剂和Pd(OAc)2存在下通过单电子转移(SET)生成的自由基中间体提出了路易斯酸。该协议使用易于获得的起始原料,良好的官能团耐受性和高效率,提供了一种操作简便,简单且可靠的方法。
Copper-promoted CN bond cross-coupling with phenylstannane
作者:Patrick Y.S. Lam、Guillaume Vincent、Damien Bonne、Charles G. Clark
DOI:10.1016/s0040-4039(02)00356-8
日期:2002.4
Copper-promoted CN bond cross-coupling of NH-containing substrates with phenylstannane at room temperature was accomplished with the addition of TBAF.
在室温下,通过添加TBAF可实现含铜底物与苯基锡烷的铜促进的CN键交叉偶联。
Promotion of reaction of NH boths with triarylbismuth and cupric acetate
作者:Dominic M.T. Chan
DOI:10.1016/s0040-4039(96)02116-8
日期:1996.12
such as triethylamine or pyridine, is described. This mild and highly efficient procedure, which is based on Barton's earlier work on the arylation of amines, can be applied to amides, imides, ureas, carbamates, and sulfonamides.