Regio- and stereo-selective oxidation of butylbenzene (1) has been examined in vitro by rat liver supernatant fraction(S-9). When phenylbutane (1 ) was incubated at 37 degrees C for 1 hr with S-9, asymmetric oxidation occurred regioselectively at benzylic and omega-1 positions to afford preferentially (R)- and (S)-alcohol (2, 4), respectively. This enzymatic propensity was the case for the production of 1, 3-diols. (1R, 3S)- or (1R, 3R)-Butanediols(3a, 3b) were also obtained at 87% and 27%, respectively. This oxidation was induced by phenobarbital (PB) or beta-napthoflavone(beta-NF), and significant sex-related differences in control and PB pre-treated rats have been observed. Since these oxidations were inhibited with SKF-525A and CO, it was inferred that cytochrome P-450 was responsible for the oxidation.
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Chem Biodivers
December 2024
Badan Riset dan Inovasi Nasional - BRIN, Research Center for Pharmaceutical Ingredients and Traditional Medicine, Jl. Raya Bogor Km. 46, 16911, Cibinong, INDONESIA.
Fungal endophytes are recognized as an essential source of bioactive compounds. Besides producing a wide variety of compounds, fungal endophytes can also facilitate a biotransformation process. In this process, endophytes act as an enzyme source to catalyze chemical reactions and modify the structures of bioactive compounds.
View Article and Find Full Text PDFArch Biochem Biophys
December 2024
Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam.
Nootkatone, a sesquiterpenoid widely used in the food and cosmetics industries, exhibits diverse biological activities and pharmaceutical prospects. Modification of nootkatone to create new derivatives with desirable activities has attracted significant attention. For this purpose, cytochrome P450 monooxygenases (P450 or CYP) are attractive candidates due to their ability to perform regio- and stereoselective hydroxylation at allylic C-H bonds.
View Article and Find Full Text PDFChemistry
October 2024
Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Vinylaziridines are important building blocks in organic chemistry, especially in the synthesis of nitrogen-containing heterocycles. The direct and efficient transfer of an appropriate nitrogen source to readily accessible conjugated dienes is a notable methodology. The Pd-catalyzed oxidative 1,2-difunctionalization of conjugated dienes through a π-allyl-palladium species should be an ideal method for the selective synthesis of vinylaziridines.
View Article and Find Full Text PDFBiosci Biotechnol Biochem
October 2024
Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan.
High-value-added compounds, such as monoterpenoids, are an important industrial targets because they are an essential group of compounds for pharmaceutical and industrial applications. Meanwhile, the depletion of natural resources and climate change demands sustainable production methods. In recent years, biocatalysis, which allows microbial bioproduction by regio- and stereo-selective reaction under mild conditions, has been attracted researchers' attention as a possible alternative to conventional methods.
View Article and Find Full Text PDFCarbohydr Res
November 2024
Centre for Glycoscience and Lennard-Jones Laboratory, School of Chemical and Physical Sciences, Keele University, Keele, Staffordshire, ST5 5BG, UK. Electronic address:
Regio- and stereo-selective synthetic routes to 2-deoxy-2-fluoro-d-mannose building blocks are often experimentally challenging when using Selectfluor with the corresponding glycal. We targeted a late-stage method to introduce fluorine in a stereospecific manner using inversion via a triflate. Accordingly, synthesis of a conventionally protected 2-deoxy-2-fluoro-d-mannose β-thioglycoside donor, directly applicable to oligosaccharide synthesis, was attempted using C2-triflate inversion of the corresponding d-glucoside with TBAF.
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