Synthesis of <i>ortho</i>-Methylated Benzamides via Palladium-Catalyzed Denitrogenative Cross-Coupling Reaction of [1,2,3]-Benzotriazin-4(3<i>H</i>)-ones with DABAL-Me<sub>3</sub>
作者:Shangzhang Li、Yang Li、Riqian Zhu、Jin Bai、Yue Shen、Mengni Pan、Wanfang Li
DOI:10.1021/acs.orglett.3c01745
日期:2023.7.28
with DABAL-Me3 [bis(trimethylaluminum)-1,4-diazabicyclo[2.2.2]octane adduct], a cheap, stable, and solid organoaluminum reagent. In the presence of Pd(OAc)2/XantPhos as a commercially available catalyst, [1,2,3]-benzotriazin-4(3H)-ones underwent denitrogenative coupling with DABAL-Me3 to afford a wide array of N-aryl amides derived from ortho-methylated carboxylic acids. Under the same catalytic conditions
我们在此开发了[1,2,3]-苯并三嗪-4(3 H )-酮与DABAL-Me 3 [双(三甲基铝)-1,4-二氮杂双环[2.2.2]辛烷加合物]的钯催化反应。 ,一种廉价、稳定的固体有机铝试剂。在 Pd(OAc) 2 /XantPhos 作为市售催化剂的存在下,[1,2,3]-苯并三嗪-4(3 H )-酮与 DABAL-Me 3进行脱氮偶联,得到多种N -衍生自邻位甲基化羧酸的芳基酰胺。在相同的催化条件下,使用三乙基铝也可以实现[1,2,3]-苯并三嗪-4(3H)-酮的邻位乙基化。