A ferric nitrate-promoted cross-dehydrogenative coupling reaction of N-hydroxyphthalimide (NHPI) with toluene derivatives is reported. The reaction proceeded smoothly using molecular oxygen as an oxidant, providing an efficient method for the synthesis of N-hydroxyimide esters. Furthermore, a plausible mechanism was proposed.
Metal-free intermolecular C–O cross-coupling reactions: synthesis of N-hydroxyimide esters
作者:Yunhe Lv、Kai Sun、Weiya Pu、Shukuan Mao、Gang Li、Jiejie Niu、Qian Chen、Tingting Wang
DOI:10.1039/c6ra22653a
日期:——
Selectfluor-mediated intermolecular C–O crosscouplingreaction for the synthesis of N-hydroxyimide esters was developed for the first time. The reaction is applicable to the coupling of readily available aryl and alkyl aldehydes with N-hydroxyphthalimide (NHPI) and N-hydroxysuccinimide (NHSI). The resulting active esters can be directly converted into amides in onepot.
Copper-Catalyzed Highly Efficient Esterification of Aldehydes with N-Hydroxyphthalimide via Cross-Dehydrogenative Coupling in Water at Room Temperature
作者:Can Jin、Weike Su、Zhicheng Guo、Xinpeng Jiang、Jiadi Zhou、Bin Sun
DOI:10.1055/s-0036-1588760
日期:2017.7
A copper-catalyzed cross-dehydrogenativecoupling reaction between N-hydroxyphthalimide and aldehydes using PhI(OAc)2 as an oxidant is described. It is reported for the first time to synthesize NHPI esters in water, providing the corresponding NHPI esters in moderate to good yields. This facile and efficient method is eco-friendly and possesses the advantages of mild conditions, short reaction time
Here, we report the novel synthesis of N-(acyloxy)phthalimides and their analogues as redox-active esters in the presence of propylphosphonic anhydride (T3P®) reagent using 2-methyltetrahydrofuran as a green solvent under mild reaction conditions. Our convenient technique provides a chromatography-free access to these remarkable synthetic intermediates with a wide substrate scope. By using our synthetic