Amine-catalyzed synthesis of N2-sulfonyl 1,2,3-triazole in water and the tunable N2-H 1,2,3-triazole synthesis in DMSO via metal-free enamine annulation
作者:Yanhui Guo、Yunyun Liu、Jie-Ping Wan
DOI:10.1016/j.cclet.2021.08.003
日期:2022.2
N2-H 1,2,3-triazoles via organocatalytic annulation of enaminone/enaminoester with sulfonylazide has been realized. The unconventional selectivity providing N2-sulfoyl 1,2,3-triazoles takes place in pure water, wherein the hydrogen bond effect between water and the intermediate resulting from enamine-azide corporation accounts for the novel reaction selectivity. On the other hand, the reactions conducted
Synthesis of Enaminone‐Pd(II) Complexes and Their Application in Catalysing Aqueous Suzuki‐Miyaura Cross Coupling Reaction
作者:Leiqing Fu、Xiaoji Cao、Jie‐Ping Wan、Yunyun Liu
DOI:10.1002/cjoc.201900417
日期:2020.3
series of Pd(II)‐enaminone complexes, termed Pd(eao)2, have been synthesized and characterized. The investigation on the catalytic activities of these new Pd(II)‐reagents has proved that the Pd(eao)2‐1 possesses excellent catalytic activity for the Suzuki‐ Miyaura cross couplingreactions of aryl bromides/chlorides with aryl/vinyl boronic acids in the environmentally benign media of aqueous PEG400 at
Domino C-H Sulfonylation and Pyrazole Annulation for Fully Substituted Pyrazole Synthesis in Water Using Hydrophilic Enaminones
作者:Yanhui Guo、Guodong Wang、Li Wei、Jie-Ping Wan
DOI:10.1021/acs.joc.8b02897
日期:2019.3.1
NH2-functionalized enaminones and sulfonyl hydrazines have been developed for the synthesis of fully substituted pyrazoles. By making use of the hydrophilic primary amino group in the enaminones, the reactions proceed well in the medium of pure water in the presence of molecular iodine, TBHP, and NaHCO3 via cascade C-H sulfonylation and pyrazole annulation. The cleavage of the C–N bond in enaminones is confirmed
Tris(β-ketoiminato)ruthenium(III) complexes: Electrochemical and computational chemistry study
作者:Tankiso Lawrence Ngake、Johannes H. Potgieter、Jeanet Conradie
DOI:10.1016/j.electacta.2019.134635
日期:2019.10
here for the first time for a series of five tris(β-ketoiminato)ruthenium(III) complexes. Since the β-ketoiminato ligand is unsymmetrical, both fac and mer isomers are theoretically possible for these octahedral complexes. Density functional theory calculations show that for complexes containing an H on the imino position, both the fac and mer are energetically possible, while for complexes with a Ph
本文首次报道了五种三(β-酮亚氨基)钌(III)配合物的电子和电化学性质。由于β-酮亚氨基配体不对称,因此对于这些八面体络合物,FAc和mer异构体在理论上都是可能的。密度泛函理论计算表明,对于含有对亚氨基位置的H复合物,两者的FAC和聚体在能量上可能的,而用于与所述亚氨基位置,博士学位络合物聚体异构体在能量上有利的,由于所引起的空间位阻FAc异构体中的Ph基团。电化学,利用循环伏安法显示Ru III / IV氧化,Ru III / II还原以及Ru II配合物的基于配体的还原。对于三(β-酮亚胺基)钌(III)配合物的不同的FAc和mer异构体,观察到了不同的Ru III / IV和Ru III / II氧化还原对。
Direct β-Acyloxylation of Enamines via PhIO-Mediated Intermolecular Oxidative C–O Bond Formation and Its Application to the Synthesis of Oxazoles
A direct β-acyloxylation of enamine compounds has been achieved by using iodosobenzene (PhIO) as an oxidant to realize the intermolecular oxidative C(sp2)-O bond formation between enamines and various carboxylic acids, including N-protected amino acids. The transformation tolerates a wide range of functional groups and furnishes a variety of β-acyloxy enamines that can be conveniently converted to