Results 81 to 90 of about 26,979 (280)

Influence of the Sulfinyl Group on the Chemoselectivity and π-Facial Selectivity of Diels−Alder Reactions of (S)-2-(p-Tolylsulfinyl)-1,4-benzoquinone

, 2016
Diels−Alder reactions of (S)-2-(p-tolylsulfinyl)-1,4-benzoquinone (1a) with cyclic (cyclopentadiene and cyclohexadiene) and acyclic dienes (1-[(trimethylsilyl)oxy]-1,3-butadiene and trans-piperylene) under different thermal and Lewis acid conditions are ...
Jean Fischer (2963988), Miguel A. Toledo (1817011), Valter Stefani (2143780), M. Carmen Carreño (2466826), Antonio Urbano (1447507), José L. García Ruano (2526475), Cynthia Z. Remor (3036033)   +6 more
core   +1 more source

Photocatalytic degradation of 1,4-Benzoquinone in aqueous ZnO dispersions. [PDF]

, 2012
The present paper reports the UV-assisted degradation of 1,4-benzoquinone in ZnO suspensions. The variables studied include the concentration of 1,4-benzoquinone, photocatalyst, pH and the total organic carbon.
Zakaria, Azmi, Jahangirian, Hossein, Shameli, Kamyar, Abdullah, Abdul Halim, Ahmadzadeh, Saeid, I. Gaya, Umar, Zainal, Zulkarnain, Gaya, Umar I., Abdollahi, Yadollah, Yusof, Nor Azah   +9 more
core   +1 more source

Hydrogenation of p-benzoquinone to hydroquinone over Pd/γ-Al₂O₃ catalyst

上海师范大学学报. 自然科学版
In this paper,a γ-Al2O3-supported palladium catalyst(Pd/γ-Al2O3) was prepared by the impregnation method and was applied to the hydrogenation of p-benzoquinone to produce hydroquinone.
HE Yi, CHEN Chenju, ZHANG Chunlei
doaj   +1 more source

The Investigation of Pyrocatechol Electrochemical Mechanism in Presence of Nitrite Ion on Platinum Electrode

International Journal of New Chemistry, 2015
In this study, the electrochemical mechanism of catechol in presence and absence of nitrite ion, is investigated in phosphate buffer medium (pH=7) using platinum electrode through cyclic voltammetry method in various scan rates. Electrochemical oxidation
Maryam Helmi , , Ali Mazloomifar , , Ali Parsa*   +2 more
doaj   +1 more source

A Bone Marrow–Mimetic Hydrogel Enables Dual‐Phase Hemostasis and Vascularized Osteogenesis for Cranial Defects

Advanced Science, EarlyView.
A biomimetic, fiber‐reinforced hydrogel (FE‐PDA@Fib/Gel‐TG) that enables dual‐phase cranial defect repair. The system provides: instant hemostasis in the early stage, and sustained co‐delivery of pro‐angiogenic and osteogenic signals for synergistic vascularized bone regeneration.
Lingbin Che, Donghong Li, Huan Zhang, Tingting Xu, Juhan Li, Xuanzhou Chen, Louis D. Zhang, Shuguang Wang, Dianwen Song, Dongyong Sha   +9 more
wiley   +1 more source

Lewis Acid-Directed Reactions of Quinones with Styrenyl Systems:  The Case of 2-Methoxy-3-methyl-1,4-benzoquinone

, 2016
Reactions of 2-methoxy-3-methyl-1,4-benzoquinone with various (E)-1-propenylbenzenes promoted by 1 equiv of Ti(IV), as a 1:1 mixture of TiCl4−Ti(O-i-Pr)4, produce rel-(1S,6R,7R,8R)-8-aryl-4,7-dimethyl-3-methoxybicyclo[4.2.0]oct-3-ene-2,5-diones 3 and ...
Thomas A. Engler (730580), Rajesh Iyengar (2521360)   +1 more
core   +1 more source

Amplification of Endoplasmic Reticulum Stress via Inhibiting Lipid Droplet Formation to Enhance Chemodynamic Immunotherapy

Advanced Science, EarlyView.
An endoplasmic reticulum (ER)‐targeted chemodynamic nanoagent (TCBQ/iLD‐ER NPs) comprising •OH‐generating tetrachloro‐1,4‐benzoquinone (TCBQ) and lipid droplets (LDs) formation inhibitor (iLD) is developed for chemodynamic immunotherapy of tumors. After ingestion by cancer cells, TCBQ/iLD‐ER NPs preferentially accumulate in the ER and react with ER ...
Huilan Cai, Shaoru Zhuang, Yang Zhu, Rujiang Ao, Meili Yu, Tingting Cui, Jun Wang, Xuegang Niu, Hongwei Huang, Shanshan Peng, Yu He, Lisen Lin, Huanghao Yang   +12 more
wiley   +1 more source

Density-Functional Studies on the Structure and Vibrational Spectra of Transient Intermediates of p-Benzoquinone

, 2016
Prediction of vibrational frequencies of polyatomic molecules using density-functional theory (DFT) methods has become common because of its accuracy and therefore consistency with experimental data.
Siva Umapathy (135157), Pothukattil Mohandas (3053199)   +1 more
core   +1 more source

Concurrent Photooxidation and Photoreduction of Catechols and Para-Quinones by Chlorophyll Metabolites

Photochem
Photosynthesis is initiated when the sun’s light induces electron transfer from chlorophyll to plastoquinone, a para-quinone. While photosynthesis occurs in the intact chloroplasts of living plants, similar photochemical reactions between dietary ...
Katherine Phan, Emily E. Lessard, Joseph A. Reed, Meredith G. Warsen, Soren Zimmer, Lisa M. Landino   +5 more
doaj   +1 more source

W‐N‐C Tandem Catalytic Centers Mediating Efficient Charge Transfer for the Enhanced Radical‐Path U(VI) Photoreduction

Advanced Science, EarlyView.
This work constructed a tandem W−N−C center to simultaneously achieve the regulation of reaction pathways and optimization of charge separation efficiency. The Lewis‐acidic W6+ sites activated O2 to generate O2−$O_2^ - $, with enhanced charge separation via electronic modulation, steering U(VI) reduction down an efficient radical pathway.
Zhiyao Wu, Jinhao Xu, Hao Fu, Yuxiang Deng, Nannan Wang, Wenhua Zhang, Peng Zhang, Zhiwei Huang, Zhenpeng Cui, Shu‐Xian Hu, Wangsuo Wu, Duoqiang Pan   +11 more
wiley   +1 more source