已经开发出一种对线性脂族腈被广泛用作工业原料化学品的生物催化方法,该方法可在高达1.4 kg / L的高底物负载下运行,如合成正辛腈所证明的那样。此底物负载量是生物催化中报道的最高负载量之一,据我们所知,在水性介质中与水不混溶产品的负载量最高。值得注意的是,在如此高的底物负载下,生物转化是通过在活性位点带有含铁血红素亚基的金属蛋白实现的。详细地说,来自芽孢杆菌的醛肟脱水酶sp。OxB-1用作醛类肟脱水的生物催化剂,是易于获得的原料,因为它们很容易从脂肪族醛通过与羟胺作为本体化学物质自发缩合而制备。在两相系统中实现了极佳的向腈的转化,并且无需进一步纯化即可轻松从反应混合物中分离出产物。脂肪腈在工业上用作生产表面活性剂和生命科学产品的溶剂和中间体。
Several primary amines 2 have been oxidized with dimethyldioxirane (1) under a variety of conditions. Mixtures of dimeric nitrosoalkanes 4 and oximes 5 were typically obtained with solutions of the oxidant in excess. In several instances, nitrones 12 were found as byproducts in these reactions. In situ oxidations using oxone in buffered aqueous acetone solution also gave nitrosoalkanes 4 and oximes 3 as important products; in addition, oxaziridines 11 were obtained in significant amounts in biphasic procedures containing methylene chloride. The corresponding nitroalkanes 3 were not formed in major amounts in either oxidation procedure, unless large excesses of oxidant were used. These results are discussed in terms of the several competing processes which occur under the different reaction conditions.
Enzymatic Synthesis of Aliphatic Nitriles at a Substrate Loading of up to 1.4 kg/L: A Biocatalytic Record Achieved with a Heme Protein
substrate loadings of up to 1.4 kg/L as demonstrated for the synthesis of n-octanenitrile. This substrate loading is one of the highest ever reported in biocatalysis and to best of our knowledge the highest obtained for a water-immiscible product in aqueous medium. It is noteworthy that the biotransformation at such a high substrate loading was achieved by means of a metalloprotein bearing an iron-containing
已经开发出一种对线性脂族腈被广泛用作工业原料化学品的生物催化方法,该方法可在高达1.4 kg / L的高底物负载下运行,如合成正辛腈所证明的那样。此底物负载量是生物催化中报道的最高负载量之一,据我们所知,在水性介质中与水不混溶产品的负载量最高。值得注意的是,在如此高的底物负载下,生物转化是通过在活性位点带有含铁血红素亚基的金属蛋白实现的。详细地说,来自芽孢杆菌的醛肟脱水酶sp。OxB-1用作醛类肟脱水的生物催化剂,是易于获得的原料,因为它们很容易从脂肪族醛通过与羟胺作为本体化学物质自发缩合而制备。在两相系统中实现了极佳的向腈的转化,并且无需进一步纯化即可轻松从反应混合物中分离出产物。脂肪腈在工业上用作生产表面活性剂和生命科学产品的溶剂和中间体。