20266-62-0Relevant articles and documents
One-Pot Biocatalytic Double Oxidation of α-Isophorone for the Synthesis of Ketoisophorone
Tavanti, Michele,Parmeggiani, Fabio,Castellanos, J. Rubén Gómez,Mattevi, Andrea,Turner, Nicholas J.
, p. 3338 - 3348 (2017/09/13)
The chemical synthesis of ketoisophorone, a valuable building block of vitamins and pharmaceuticals, suffers from several drawbacks in terms of reaction conditions and selectivity. Herein, the first biocatalytic one-pot double oxidation of the readily available α-isophorone to ketoisophorone is described. Variants of the self-sufficient P450cam-RhFRed with improved activity have been identified to perform the first step of the designed cascade (regio- and enantioselective allylic oxidation of α-isophorone to 4-hydroxy-α-isophorone). For the second step, the screening of a broad panel of alcohol dehydrogenases (ADHs) led to the identification of Cm-ADH10 from Candida magnoliae. The crystal structure of Cm-ADH10 was solved and docking experiments confirmed the preferred position and geometry of the substrate for catalysis. The synthesis of ketoisophorone was demonstrated both as a one-pot two-step process and as a cascade process employing designer cells co-expressing the two biocatalysts, with a productivity of up to 1.4 g L?1 d?1.
Compositions of iodophenoxy alkanes and iodophenyl ethers in combination with cellulose derivatives for visualization of the gastrointestinal tract
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, (2008/06/13)
Disclosed are x-ray contrast compositions for oral or retrograde examination of the gastrointestinal tract comprising an iodophenoxy alkane, iodophenyl alkenylalkyl ether or an iodophenyl alkynylalkyl ether x-ray producing agent in combination with a cellulose derivative in a pharmaceutically acceptable carrier; and methods for their use in diagnostic radiology of the gastrointestinal tract.
Compositions of iodophenoxy alkanes and iodophenyl ethers in film-forming materials for visualization of the gastrointestinal tract
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, (2008/06/13)
Disclosed are x-ray contrast compositions for oral or retrograde examination of the gastrointestinal tract comprising a polymeric material capable of forming a coating on the gastrointestinal tract and an x-ray producing agent of the formula STR1 and meth