Green Method for the Synthesis of Chromeno[2,3-c]pyrazol-4(1H)-ones through Ionic Liquid Promoted Directed Annulation of 5-(Aryloxy)-1H-pyrazole-4-carbaldehydes in Aqueous Media
摘要:
The first classical heterocyclic ionic liquid (IL) promoted C-H bond oxidant cross-doupling,reaction for the intramolecular annulation of 5-(aryloxy)-1H-pyrazole-4-carbal- dehydes to chromeno[2,37c]pyrazol-4(1H)-ones has been disclosed The promoter 1,3-dibutyl-1H-benzo[d]fl 2 3]- triazol-34-ium bromide can be easily recycled reused with the same efficacies for at least five cycles in aqueous medium The strategy works smoothly and provides applicable protocol to construct a Wide range of products.
Synthesis of Some 1-Aryl-4-(2-hydroxybenzoyl)-pyrazol-5-one and 1-Aryl[1]benzopyrano [2,3-<i>c</i>]pyrazol-4(1<i>H</i>)-one Derivatives from 3-Acyl-4-hydroxycoumarins
作者:Bernard Chantegrel、Abdel-Ilah Nadi、Suzanne Gelin
DOI:10.1055/s-1983-30286
日期:——
CHANTEGREL, B.;NADI, ABDEL-ILAH;GELIN, S., SYNTHESIS, 1983, N 3, 214-216
作者:CHANTEGREL, B.、NADI, ABDEL-ILAH、GELIN, S.
DOI:——
日期:——
Green Method for the Synthesis of Chromeno[2,3-<i>c</i>]pyrazol-4(1<i>H</i>)-ones through Ionic Liquid Promoted Directed Annulation of 5-(Aryloxy)-1<i>H</i>-pyrazole-4-carbaldehydes in Aqueous Media
作者:He Li、Chenjiang Liu、Yonghong Zhang、Yadong Sun、Bin Wang、Wenbo Liu
DOI:10.1021/acs.orglett.5b00033
日期:2015.2.20
The first classical heterocyclic ionic liquid (IL) promoted C-H bond oxidant cross-doupling,reaction for the intramolecular annulation of 5-(aryloxy)-1H-pyrazole-4-carbal- dehydes to chromeno[2,37c]pyrazol-4(1H)-ones has been disclosed The promoter 1,3-dibutyl-1H-benzo[d]fl 2 3]- triazol-34-ium bromide can be easily recycled reused with the same efficacies for at least five cycles in aqueous medium The strategy works smoothly and provides applicable protocol to construct a Wide range of products.