Ceric Ammonium Nitrate (CAN) Promoted Pd<sup>II</sup>-Catalyzed Substrate-Directed<i>o</i>-Benzoxylation and Decarboxylative<i>o</i>-Aroylation
作者:Sourav Kumar Santra、Arghya Banerjee、Nilufa Khatun、Bhisma K. Patel
DOI:10.1002/ejoc.201403367
日期:2015.1
Inexpensive cericammoniumnitrate (CAN) is an efficient oxidant for the Pd-catalyzed substrate-directed o-benzoxylation and decarboxylative o-aroylation processes. In the presence of CAN, the reaction of directing arenes with carboxylic acids resulted in o-benzoxylated products, whereas a decarboxylative o-aroylation occurred by using α-keto acids, which led to the formation of o-aroylation products
廉价的硝酸铈铵 (CAN) 是 Pd 催化的底物导向邻苯甲氧基化和脱羧邻芳酰化过程的有效氧化剂。在 CAN 存在下,定向芳烃与羧酸反应生成邻苯甲酰化产物,而使用 α-酮酸发生脱羧邻芳酰化,从而形成邻芳酰化产物。
2,3-Diarylquinoxaline directed mono ortho-aroylation via cross-dehydrogenative coupling using aromatic aldehydes or alkylbenzenes as aroyl surrogate
作者:Sourav Kumar Santra、Arghya Banerjee、Bhisma K. Patel
DOI:10.1016/j.tet.2014.02.034
日期:2014.4
directed mono ortho-aroylation protocol has been developed using aromaticaldehydes or alkybenzenes as aroyl surrogates. Out of the four available ortho sp2 C–H bonds in the two aryl rings of 2,3-diarylquinoxaline one of the C–H bond is selectively ortho-aroylated. The reaction proceeds via the aroyl radical path in the case of aromaticaldehydes while the alkylbenzenes follow either an aroyl radical or a