نتایج جستجو برای: regioselective

تعداد نتایج: 2974  

2017
Erick Abreu Silveira Sonia Moreno-Perez Alessandra Basso Simona Serban Rita Pestana Mamede Paulo W Tardioli Cristiane Sanchez Farinas Javier Rocha-Martin Gloria Fernandez-Lorente Jose M Guisan

BACKGROUND Enzymatic ethanolysis of oils (for example, high oleic sunflower oil containing 90% of oleic acid) may yield two different reaction products depending on the regioselectivity of the immobilized lipase biocatalyst. Some lipase biocatalysts exhibit a 1,3-regioselectivity and they produced 2 mols of fatty acid ethyl ester plus 1 mol of sn2-monoacylglycerol (2-MAG) per mol of triglycerid...

In this protocol, 3-(2-carboxybenzoyl)-1-methyl-1H-imidazol-3-ium chloride [Cbmim]Cl and sulfonic acid functionalized pyridinium chloride [pyridine-SO3H]Cl as a new, reusable, and green Brønsted acidic ionic liquid (BAIL) catalyst were synthesized and successfully used for the one-pot ring opening of epoxide with sodium azide (NaN3) in water at room temperature. Epoxides under ring-opening easi...

Journal: :Acta Chemica Scandinavica 1979

Journal: :Angewandte Chemie 2022

A catalysis-based regioselective 1,4-fluorofunctionalization of trifluoromethyl substituted 1,3-dienes has been developed to access compact, highly functionalized products. The process allows E,Z-mixed dienes be processed a single E-alkene isomer, and leverages an inexpensive operationally convenient I(I)/I(III) catalysis platform. first example catalytic 1,4-difluorination is disclosed subsequ...

Journal: :Journal of the American Chemical Society 2019

Journal: :Acta Crystallographica Section A Foundations of Crystallography 1996

Journal: :Chemical and Pharmaceutical Bulletin 1979

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