93-07-2Relevant articles and documents
ON THE KNOWLEDGE OF VIETNAMESE CITRONELLA OIL.
SCHMIDT,BERNHARDT,MUEHLSTAEDT
, p. 544 - 548 (1963)
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Bruhn,Agurell
, p. 574,575 (1974)
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Enzymatic oxidation of manganese ions catalysed by laccase
Gorbacheva, Marina,Morozova, Olga,Shumakovich, Galina,Streltsov, Alexander,Shleev, Sergey,Yaropolov, Alexander
, p. 1 - 5 (2009)
The principal possibility of enzymatic oxidation of manganese ions by fungal Trametes hirsuta laccase in the presence of oxalate and tartrate ions, whereas not for plant Rhus vernicifera laccase, was demonstrated. Detailed kinetic studies of the oxidation of different enzyme substrates along with oxygen reduction by the enzymes show that in air-saturated solutions the rate of oxygen reduction by the T2/T3 cluster of laccases is fast enough not to be a readily noticeable contribution to the overall turnover rate. Indeed, the limiting step of the oxidation of high-redox potential compounds, such as chelated manganese ions, is the electron transfer from the electron donor to the T1 site of the fungal laccase.
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Shakirov,Yunusov
, (1971)
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Bruhn,Sanchez-Mejorada
, p. 622 (1977)
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The structure of akiferinin
Kadyrov,Saidkhodzhaev
, p. 112 - 113 (1978)
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Kinetics and process parameter studies in catalytic air oxidation of veratraldehyde to veratric acid
Mukhopadhyay, Sudip
, p. 365 - 369 (1999)
Kinetics and different process parameters for the air oxidation of veratraldehyde to veratric acid were studied. At a temperature of 130 °C, air pressure of 1 MPa, cobalt acetate loading of 0.03 mol/L, and an initial concentration of 30% w/v of veratraldehyde, the reaction was found to be first order with respect to veratraldehyde. In 3 h at an aldehyde conversion level of 100%, as high as 99% selectivity was achieved.
Selectively Upgrading Lignin Derivatives to Carboxylates through Electrochemical Oxidative C(OH)?C Bond Cleavage by a Mn-Doped Cobalt Oxyhydroxide Catalyst
Zhou, Hua,Li, Zhenhua,Xu, Si-Min,Lu, Lilin,Xu, Ming,Ji, Kaiyue,Ge, Ruixiang,Yan, Yifan,Ma, Lina,Kong, Xianggui,Zheng, Lirong,Duan, Haohong
supporting information, p. 8976 - 8982 (2021/03/16)
Oxidative cleavage of C(OH)?C bonds to afford carboxylates is of significant importance for the petrochemical industry and biomass valorization. Here we report an efficient electrochemical strategy for the selective upgrading of lignin derivatives to carboxylates by a manganese-doped cobalt oxyhydroxide (MnCoOOH) catalyst. A wide range of lignin-derived substrates with C(OH)-C or C(O)-C units undergo efficient cleavage to corresponding carboxylates in excellent yields (80–99 %) and operational stability (200 h). Detailed investigations reveal a tandem oxidation mechanism that base from the electrolyte converts secondary alcohols and their derived ketones to reactive nucleophiles, which are oxidized by electrophilic oxygen species on MnCoOOH from water. As proof of concept, this approach was applied to upgrade lignin derivatives with C(OH)-C or C(O)-C motifs, achieving convergent transformation of lignin-derived mixtures to benzoate and KA oil to adipate with 91.5 % and 64.2 % yields, respectively.
Synthesis and antitumor activity of novel pyridoxine-based structural analogs of saccharumoside-B
Pugachev, Mikhail V.,Agafonova, Maria N.,Bastrikova, Oksana A.,Gnezdilov, Oleg I.,Nikishova, Tatyana V.,Balakin, Konstantin V.,Shtyrlin, Yurii G.
, p. 1139 - 1150 (2021/03/31)
A series of 11 new pyridoxine-based structural analogs of saccharumoside-B were obtained using original synthetic approach. Antitumor activity of these compounds against nine human tumor cell lines (MCF-7, MDA-MB-231, A-498, SNB-19, M-14, NCI-H322M, HCT-115, HCT-116, and PC-3) was studied, and cytotoxic activity to three normal (HEK-293, Chang Liver, and MSC) cell lines was evaluated. Among the synthesized compounds, 12d, 12e, 13b, 13d, 13e, and 14 exhibited the highest antitumor activity, comparable to that of camptothecin and doxorubicin, but with significantly increased selectivity toward tumor cells. [Figure not available: see fulltext.]
