Rearrangement of aldoximes to amides in water under air atmosphere catalyzed by water-soluble iridium complex [Cp*Ir(H<sub>2</sub>O)<sub>3</sub>][OTf]<sub>2</sub>
作者:Chunlou Sun、Panpan Qu、Feng Li
DOI:10.1039/c3cy00934c
日期:——
[Cp*Ir(H2O)3][OTf]2, a variety of aldoximes, including aromatic, aliphatic, conjugatedunsaturated and non-conjugated unsaturated, were converted into their corresponding amides in water with good to excellent yields. Further, the one-pot synthesis of amides from aldehydes, hydroxylamine hydrochloride and sodium carbonate via a tandem condensation–rearrangement reaction in water was also accomplished. Compared
Highly efficient synthesis of primary amides <i>via</i> aldoximes rearrangement in water under air atmosphere catalyzed by an ionic ruthenium pincer complex
作者:Fa-Liu Yang、Xinju Zhu、Dun-Kang Rao、Xiao-Niu Cao、Ke Li、Yan Xu、Xin-Qi Hao、Mao-Ping Song
DOI:10.1039/c6ra07515k
日期:——
aldoximes to primary amides has been evaluated using pincer ruthenium complexes a–c, among which the ionic Ru catalyst a proved to be the most efficient in water under air atmosphere. A variety of (hetero)arene aldoximes proceeded smoothly to afford amides in high yields with good functional group compatibilities. Furthermore, a direct syntheticroute of amides from aldehydes, hydroxylamine hydrochloride
Cinchonidine-Catalyzed Synthesis of Oxazabicyclo[4.2.1]nonanones from <i>N</i>-Aryl-<i>α,β</i>-unsaturated Nitrones and 1-Ethynylnaphthalen-2-ols
作者:Cui Wei、Zhou Zhou、Guang-Li Pang、Cui Liang、Dong-Liang Mo
DOI:10.1021/acs.orglett.2c01049
日期:2022.6.17
1]nonanone derivatives were prepared in good yields through a cinchonidine-catalyzed cascade reaction of N-aryl-α,β-unsaturated nitrones and 1-ethynylnaphthalen-2-ols. Mechanistic studies show that the reaction undergoes a [4 + 3] cycloaddition of nitrones to vinylidene o-quinone methide generated in situ from 1-ethynylnaphthalen-2-ols in the presence of cinchonidine, 1,3-rearrangement of N–O vinyl moieties