磁性可分离的CuFe 2 O 4纳米颗粒在水中催化的无配体CS偶联:进入(E)-和(Z)-苯乙烯基- ,杂芳基和空间受阻的芳基硫醚
摘要:
AbstractAn efficient coupling of styrenyl, heteroaryl and sterically hindered aryl halides with aryl‐ and heteroarylthiols catalyzed by the bimetallic Cu and Fe nanomaterial, CuFe2O4, in water in the presence of tetrabutylammonium bromide and potassium phosphate (K3PO4) has been achieved without using any ligand. A series of unsymmetrical functionalized (E)‐ and (Z)‐styrenyl aryl, heteroaryl heteroaryl and sterically hindered aryl aryl sulfides has been obtained by this procedure. The compounds are obtained in high yields and excellent stereoselectivity has been observed for styrenyl sulfides. The catalyst can be easily separated by an external magnet and recycled for ten times without any appreciable loss of activity. This procedure provides an easy access to useful and challenging biologically active organosulfides which are difficult to achieve by other methods.magnified image
Kinetic Resolution of Sulfoximines via Asymmetric Organocatalyzed Formation of Benzothiadiazine-1-oxides
作者:Mengyao Tang、Mengyao Yuan、Shibin Hong、Qianwen Jiang、Huanchao Gu、Xiaoyu Yang
DOI:10.1021/acs.orglett.4c00266
日期:2024.3.8
A catalytic kineticresolution of sulfoximines has been developed through chiral phosphoric acid-catalyzed intramolecular dehydrative cyclizations. A variety of racemic sulfoximines bearing an ortho-amidophenyl moiety underwent asymmetric dehydrative cyclizations using this method, yielding both the recovered sulfoximines and benzothiadiazine-1-oxide products with good to high enantioselectivities
GROL C. J.; ROLLEMA H., J. MED.CHEM. <JMCM-AR>, 1975, 18, NO 8, 857-861
作者:GROL C. J.、 ROLLEMA H.
DOI:——
日期:——
Magnetically Separable CuFe<sub>2</sub>O<sub>4</sub>Nanoparticles Catalyzed Ligand-Free CS Coupling in Water: Access to (<i>E</i>)- and (<i>Z</i>)-Styrenyl-, Heteroaryl and Sterically Hindered Aryl Sulfides
作者:Debasish Kundu、Tanmay Chatterjee、Brindaban C. Ranu
DOI:10.1002/adsc.201300261
日期:2013.8.12
AbstractAn efficient coupling of styrenyl, heteroaryl and sterically hindered aryl halides with aryl‐ and heteroarylthiols catalyzed by the bimetallic Cu and Fe nanomaterial, CuFe2O4, in water in the presence of tetrabutylammonium bromide and potassium phosphate (K3PO4) has been achieved without using any ligand. A series of unsymmetrical functionalized (E)‐ and (Z)‐styrenyl aryl, heteroaryl heteroaryl and sterically hindered aryl aryl sulfides has been obtained by this procedure. The compounds are obtained in high yields and excellent stereoselectivity has been observed for styrenyl sulfides. The catalyst can be easily separated by an external magnet and recycled for ten times without any appreciable loss of activity. This procedure provides an easy access to useful and challenging biologically active organosulfides which are difficult to achieve by other methods.magnified image
GROL C. J., J. HETEROCYCL. CHEM. <JHTC-AD>, 1974, 11, NO 6, 953-958