An efficient approach to bis-benzoquinonylmethanes on water under catalysis of the bio-derived O-carboxymethyl chitosan
作者:Fatereh Asghari-Haji、Kurosh Rad-Moghadam、Nosrat O. Mahmoodi
DOI:10.1039/c5ra26580k
日期:——
O-Carboxymethyl chitosan was found to simulate an enzyme-like catalytic activity in the one-pot pseudo-three-component synthesis of bis-benzoquinonylmethane dyes in water.
Highly efficacious preparation of 3,3′-(arylmethylene)-bis(2-hydroxynaphthoquinone) derivatives catalyzed by a nanorod-structured organic–inorganic hybrid material
作者:Abdolkarim Zare、Jaleh Atashrooz、Mohammad Mehdi Eskandari
DOI:10.1007/s11164-020-04375-6
日期:2021.4
catalyst for the solvent-free preparation of 3,3'-(arylmethylene)-bis(2-hydroxynaphthoquinone) 3,3′-(arylmethylene)-bis(2-hydroxynaphthalene-1,4-dione)} derivatives in high yields and relatively short times. The one-pot pseudo-multi-component reaction of 2-hydroxynaphthoquinone (2-hydroxynaphthalene-1,4-dione) (2 eq.) and arylaldehydes (1 eq.) has been used for the preparation of these compounds. Graphic
A highly efficient and green protocol for the synthesis of 3,3′-(arylmethylene)-bis(2-hydroxynaphthoquinone) derivatives catalyzed by a dicationic molten salt
作者:Abdolkarim Zare、Aysoda Ghobadpoor
DOI:10.1515/znb-2020-0174
日期:2021.2.23
A highly efficient and green protocol for the synthesis of 3,3′-(arylmethylene)-bis(2-hydroxynaphthoquinone) 3,3′-(arylmethylene)-bis(2-hydroxynaphthalene-1,4-dione)} derivatives has been developed. The reaction of 2-hydroxynaphthoquinone (2-hydroxynaphthalene-1,4-dione) (2 eq.) and arylaldehydes (1 eq.) in the presence of the dicationic molten salt N , N , N ′, N ′-tetramethylethylenediaminium bis-hydrogensulfate
3,3′-(Arylmethylene)bis(2-hydroxynaphthalene-1,4-dione) as the Main Product of the Mannich Reaction of 2-Hydroxy-1,4-Naphthoquinone with 4<i>H</i>-1,2,4-Triazol-4-Amine and Various Aldehydes
The Mannichreaction of lawsone with various aldehydes and 4H-1,2,4-triazol-4-amine gave unexpected 3,3′-(arylmethylene)bis(2-hydroxynaphthalene-1,4-dione) derivatives. With 2,4-dihydroxybenzaldehyde under the same conditions, it led to the formation of 3-hydroxy-12-(3-hydroxy-1,4-dioxo-1,4-dihydronaphthalen-2-yl)-6H-benzo[b]xanthene-6,11(12H)-dione instead of various triazolylaminonaphthoquinones