From Alkanes to Carboxylic Acids: Terminal Oxygenation by a Fungal Peroxygenase
作者:Andrés Olmedo、Carmen Aranda、José C. del Río、Jan Kiebist、Katrin Scheibner、Angel T. Martínez、Ana Gutiérrez
DOI:10.1002/anie.201605430
日期:2016.9.26
A new heme–thiolate peroxidase catalyzes the hydroxylation of n‐alkanes at the terminal position—a challenging reaction in organicchemistry—with H2O2 as the only cosubstrate. Besides the primary product, 1‐dodecanol, the conversion of dodecane yielded dodecanoic, 12‐hydroxydodecanoic, and 1,12‐dodecanedioic acids, as identified by GC–MS. Dodecanal could be detected only in trace amounts, and 1,12‐dodecanediol
一种新的血红素-硫醇盐过氧化物酶催化H 2 O 2末端正构烷烃的羟基化,这在有机化学中是一项具有挑战性的反应作为唯一的共同基质。根据GC-MS的鉴定,除主要产物1-十二烷醇外,十二烷的转化还产生十二烷酸,12-羟基十二烷酸和1,12-十二烷二酸。只能检测到痕量的十二烷,而未观察到1,12-十二烷二醇,因此表明十二烷酸是单端和双端羟基化之间的分支点。同时,在其他烃链位置(优选C2和C11)观察到氧合。在十四烷的反应中观察到相似的结果。形成的产品图案,以及从共基质H 2 18 O 2中引入18 O的数据证明该酶起过氧化酶的作用,能够催化长链正构烷烃的单端和双端氧化反应的级联反应生成羧酸。
Efficient biocatalytic C–H bond oxidation: an engineered heme-thiolate peroxygenase from a thermostable cytochrome P450
作者:Alecia R. Gee、Isobella S. J. Stone、Tegan P. Stockdale、Tara L. Pukala、James J. De Voss、Stephen G. Bell
DOI:10.1039/d3cc04626e
日期:——
highly sought after reaction in chemical synthesis is the activation of unactivated carbon–hydrogen bonds. We demonstrate the hydroxylation of fatty acidsusing an engineered thermostable archaeal cytochrome P450 enzyme. By replacing a seven aminoacid section of the I-helix, the nicotinamide cofactor-dependent monooxygenase was converted into a hydrogen peroxide using peroxygenase, enabling the efficient
化学合成中备受追捧的反应是未活化的碳氢键的活化。我们使用工程化的热稳定古菌细胞色素 P450 酶演示了脂肪酸的羟基化。通过替换 I 螺旋的 7 个氨基酸部分,烟酰胺辅因子依赖性单加氧酶使用过加氧酶转化为过氧化氢,从而能够在室温至 90 °C 下对 C-H 键进行有效的生物催化氧化。
Lactones from Unspecific Peroxygenase-Catalyzed In-Chain Hydroxylation of Saturated Fatty Acids
作者:Ana C. Ebrecht、Thato M. Mofokeng、Frank Hollmann、Martha S. Smit、Diederik J. Opperman
DOI:10.1021/acs.orglett.3c01601
日期:2023.7.14
γ- and δ-lactones are valuable flavor and fragrance compounds. Their synthesis depends on the availability of suitable hydroxy fatty acid precursors. Three short unspecific peroxygenases were identified that selectively hydroxylate the C4 and C5 positions of C8–C12 fatty acids to yield after lactonization the corresponding γ- and δ-lactones. A preference for C4 over C5 hydroxylation gave γ-lactones