Visible-light assisted of nano Ni/g-C3N4 with efficient photocatalytic activity and stability for selective aerobic C−H activation and epoxidation
作者:Mona Hosseini-Sarvari、Zahra Akrami
DOI:10.1016/j.jorganchem.2020.121549
日期:2020.12
A selective, economical, and ecological protocol has been described for the oxidation of methyl arenes and their analogs to the corresponding carbonyl compounds and epoxidation reactions of alkenes with molecular oxygen (O2) or air as a green oxygen source, under mild reaction conditions. The nano Ni/g-C3N4 exhibited high photocatalytic activity, stability, and selectivity in the C−H activation of
已经描述了选择性,经济和生态的方案,用于在温和的反应条件下,将甲基芳烃及其类似物氧化为相应的羰基化合物,以及烯烃与分子氧(O 2)或作为绿色氧源的空气进行环氧化反应。纳米Ni / gC 3 N 4在不使用氧化剂和碱的情况下在可见光照射下在甲基芳烃,亚甲基芳烃的CH活化以及各种烯烃的环氧化中表现出高的光催化活性,稳定性和选择性。免费条件。
Oxidative Cleavage of Nitroalkenes with Hydrogen Peroxide in Environmentally Acceptable Solvents
作者:Olga Bortolini、Antonio De Nino、Marco Fogagnolo、Giancarlo Fantin、Loredana Mariuolo、Amedeo Tocci
DOI:10.1246/cl.2007.472
日期:2007.3.5
Hydrogen peroxide serves as an efficient oxidant for the nitroalkene C=C bond cleavage to aldehydes in ionic liquids.
Mutant epoxide hydrolases having an amino acid substitution of a tyrosine residue in the cap domain of the wild type epoxide hydrolase, in particular mutant epoxide hydrolases having an amino acid substitution of the tyrosine residue corresponding to Tyr152 or Tyr215 in an epoxide hydrolase with an aminoacid sequence according to SEQ ID No. 1. Preferably the Tyr is substituted by Phe. The invention also relates to nucleic acid sequences encoding such mutant epoxide hydrolases expression constructs wherein such nucleic acid sequence according is operably linked to a regulatory region capable of directing the expression of the mutant epoxide hydrolase in a suitable expression host, vectors capable of transforming a host cell characterized in that the vector containing such expression construct, transformed host cells transformed with such a vector, processes for the preparation of such mutant epoxide hydrolases and processes for the preparation of optically active epoxides and/or diols using such mutant epoxide hydrolases.
Mutant epoxide hydrolases having an amino acid substitution of a tyrosine residue in the cap domain of the wild type epoxide hydrolase, in particular mutant epoxide hydrolases having an amino acid substitution of the tyrosine residue corresponding to Tyr?152 or Tyr215¿ in an epoxide hydrolase with an aminoacid sequence according to SEQ ID No. 1. Preferably the Tyr is substituted by Phe. The invention also relates to nucleic acid sequences encoding such mutant epoxide hydrolases expression constructs wherein such nucleic acid sequence according is operably linked to a regulatory region capable of directing the expression of the mutant epoxide hydrolase in a suitable expression host, vectors capable of transforming a host cell characterized in that the vector containing such expression construct, transformed host cells transformed with such a vector, processes for the preparation of such mutant epoxide hydrolases and processes for the preparation of optically active epoxides and/or diols using such mutant epoxide hydrolases.