2525-40-8Relevant articles and documents
COMPOSITES, METHODS AND USES THEREOF
-
Page/Page column 26; 32, (2021/06/04)
The present invention relates, in general terms, to methods of catalysing a reaction, including the steps of contacting a chemical entity comprising a sulphide moiety with a composite and an oxidant. The composite acts as a heterogeneous catalyst to oxidise the sulphide moiety. The present invention also relates to composites, methods of synthesising the composites and its use as a catalyst thereof.
Direct Decarboxylative Allylation and Arylation of Aliphatic Carboxylic Acids Using Flavin-Mediated Photoredox Catalysis
Ramirez, Nieves P.,Lana-Villarreal, Teresa,Gonzalez-Gomez, Jose C.
supporting information, p. 1539 - 1550 (2019/08/07)
We describe herein a direct decarboxylative allylation of aliphatic carboxylic acids with allylsulfones using visible light and riboflavin tetraacetate (RFTA) as photocatalyst. The reaction proceeds at room temperature tolerating a wide range of functiona
Sulfinate-Organocatalyzed (3+2) Annulation Reaction of Propargyl or Allenyl Sulfones with Activated Imines
Martzel, Thomas,Lohier, Jean-Fran?ois,Gaumont, Annie-Claude,Brière, Jean-Fran?ois,Perrio, Stéphane
, p. 5069 - 5073 (2018/09/14)
An operationally simple methodology for the synthesis of 4-sulfonyl-3-pyrrolines is described using a propargylic sulfone and N-sulfonyl imines as substrates. This annulation process is initiated by an arenesulfinate organocatalyst, which allows a smooth isomerization of the alkynyl precursor into the corresponding allene, followed by the generation of a highly reactive allyl sulfone anion. An asymmetric version involving an unprecedented enantiopure sulfinate–ammonium cooperative ion pair (PhSO2– R4N+*) was investigated. A proof-of-concept, with enantiomeric excesses of up to 41 %, was obtained according to a preliminary screening of commercially available chiral phase-transfer catalysts.