MeONH2·HCl-Mediated α-Methylenation/Conjugate Addition of α-Sulfonyl o-Hydroxyacetophenones with Methyl Sulfoxides: Route to 3-Sulfonylchroman-4-ones
作者:Meng-Yang Chang、Kuan-Ting Chen
DOI:10.1055/s-0040-1707245
日期:2021.1
Abstract A novel and efficient route for the synthesis of 3-sulfonylchroman-4-ones from α-sulfonyl o-hydroxyacetophenones with methyl sulfoxides via a MeONH2·HCl-mediated sequential methylenation/ conjugate addition is described. Plausible reaction mechanisms are proposed and discussed. Various reaction conditions for this novel, one-pot, environmentally friendly conversion were investigated.
Photoinduced electron-transfer reaction between excited β-ketosulfones and ascorbic acid provides an efficient and green approach for the desulfonylation of β-ketosulfones.
Aryllead triacetates as synthons for the synthesis of biflavonoids. Part 2. Synthesis of a Garcinia-type biflavonoid
作者:Dervilla M. X. Donnelly、Brendan M. Fitzpatrick、Sarah M. Ryan、Jean-Pierre Finet
DOI:10.1039/p19940001797
日期:——
Arylation of 3-(phenylsulfonyl)chroman-4-one 1 with simple aryllead triacetates affords the corresponding 3-aryl-3-(phenylsulfonyl)chroman-4-one in 64-74% yield. However. no reaction took place with the hindered 2,4,6-trimethoxyphenyllead triacetate 9. Reaction of the 8-triacetoxyplumbyl-flavane derivative 10 with 4'-methoxy-3-(phenylsulfanyl)flavanone 11 afforded the biflavanone 12 in 64% yield. Nickel boride reduction of compound 12 led to the chalcone 13, which was recyclised to the Garcinia-type (I-3, II-8) biflavanone 14. Dimethyldioxirane oxidation of 12 gave the flavone-flavanone 15.
3-Phenylsulfonyl-3-(2-propenyl)chroman-4-one
作者:D. Sriram、S. Srinivasan、K. C. Santhosh
DOI:10.1107/s0108270197001261
日期:1997.6.15
In the title compound, C18H16O4S, the pyran ring adopts a sofa conformation. The bond angles around the two planar C atoms in the ring deviate from their ideal values.
[EN] NOVEL 3-BENZYLIDINE AND 3-BENZYL SUBSTITUTED CHROMANONES<br/>[FR] CHROMANONES 3-BENZYLIDINE ET 3-BENZYLE SUBSTITUÉES INÉDITES
申请人:ITHERX PHARMACEUTICALS INC
公开号:WO2008067451A1
公开(公告)日:2008-06-05
[EN] The present invention provides novel chromanone derivatives that are useful for the treatment of inflammatory diseases, cancer and age-related macular degeneration [FR] La présente invention concerne des dérivés inédits de chromanone, utilisables pour le traitement des affections inflammatoires, du cancer et de la dégénérescence maculaire liée à l'âge.