BINAP-copper supported by hydrotalcite as an efficient catalyst for the borrowing hydrogen reaction and dehydrogenation cyclization under water or solvent-free conditions
作者:Zhaojun Xu、Xiaoli Yu、Xinxin Sang、Dawei Wang
DOI:10.1039/c8gc00557e
日期:——
A BINAP-Cu system supported by hydrotalcite has been developed and proved to be a highlyefficientcatalyst for the atom-efficient and green borrowing hydrogen reaction and dehydrogenative cyclization. This BINAP-Cu complex supported by hydrotalcite is highly air-stable and can be recycled at least five times under solvent-free conditions. Notably, 1-benzyl-2-aryl-1H-benzo[d]imidazole derivatives could
已经开发了由水滑石支撑的BINAP-Cu系统,并被证明是一种高效的催化剂,用于原子效率高的绿色借入氢反应和脱氢环化反应。这种由水滑石负载的BINAP-Cu络合物具有高度的空气稳定性,在无溶剂条件下可以循环至少五次。值得注意的是,第一次以水为溶剂仅一步即可由醇合成1-苄基-2-芳基-1 H-苯并[ d ]咪唑衍生物。这为在水或无溶剂条件下以高收率合成官能化的胺,酮和1-苄基-2-芳基-1 H-苯并[ d ]咪唑衍生物提供了一种更加绿色有效的催化方法。
CX (X=Br, I) Bond-Tolerant Aerobic Oxidative Cross- Coupling: A Strategy to Selectively Construct β-Aryl Ketones and Aldehydes
作者:Mao Chen、Jie Wang、Ziyi Chai、Cai You、Aiwen Lei
DOI:10.1002/adsc.201100782
日期:2012.2
aryl halide-containing β-aryl ketones and aldehydes can be synthesized directly from readily available allyic alcohols and boronic acids via palladium-catalyzedoxidativecross-coupling reactions. The dual roles of copper, including electron-carrier and Lewis acid functions, are supposed to be critical for the high reactivity and selectivity of this aerobic oxidative coupling transformation.