Results 221 to 230 of about 1,138,126 (397)

Direct Access to α,β‐Unsaturated γ‐Lactams via Palladium‐Catalysed Carbonylation of Propargylic Ureas.

Advanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract Additive carbonylations typically necessitate strong nucleophiles, such as alcohols or amines. In this study, we carbonylated a poorly nucleophilic urea, under oxidant‐free conditions. Our straightforward carbonylative strategy enables access to versatile α,β‐unsaturated γ‐lactams featuring an aminocarbonyl fragment, utilizing readily ...
Debora Schiroli, Aleksandr Voronov, Francesco Pancrazzi, Nunzio Iraci, Salvatore Vincenzo Giofrè, Beatrice Macchi, Valeria Stefanizzi, Raffaella Mancuso, Bartolo Gabriele, Paolo Pio Mazzeo, Luca Capaldo, Nicola Della Ca'   +11 more
wiley   +1 more source

Studies on removal of petroleum fractions from spent petrochemical catalysts to prepare them for pyrometallurgical recovery of Ni, Mo and V. [PDF]

Sci Rep
Madej P, Czech A, Pęcak K, Cybulski A.
europepmc   +1 more source

Improving the Photochemical Skeletal Enlargement of Pyridines to 1,2‐Diazepines with Isocyanates

Advanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract In this work, we extend the one‐pot protocol to synthesize 1,2‐diazepines from commercially available and cheap starting materials. Capitalizing on isocyanate derivatives as activating agents, the photochemical skeletal enlargement occurs, while preserving key functional groups embedded in more than 30 substrates.
Clément Ghiazza, Aurélie Damond, Jérôme Marrot, Xavier Moreau   +3 more
wiley   +1 more source

Demulsification techniques of water-in-oil and oil-in-water emulsions in petroleum industry

, 2016
R. Zolfaghari, A. Fakhru’l-Razi, L. Abdullah, S. Elnashaie, A. Pendashteh   +4 more
semanticscholar   +1 more source

Comparative Genomics, Transcriptome, and Prokaryotic Expression Analysis of <i>alk</i>B1_1 in <i>Acinetobacter vivianii</i> KJ-1: Revealing the Mechanism of Petroleum Hydrocarbon Degradation. [PDF]

Int J Mol Sci
Cui Q, Zhang Y, Wang J, Wang J, Zhao Q, Song F, Wang L, Zhang W, Huang Y.   +8 more
europepmc   +1 more source

Mg(SPh)2 as a Catalyst for Efficient Photocatalytic Alkylation Reactions of Active Methylene Compounds with Nonactivated Alkenes

Advanced Synthesis &Catalysis, Volume 367, Issue 5, March 4, 2025.
Abstract Mg(SPh)2 has been found to be a highly active catalyst in photocatalytic alkylation reactions of active methylene compounds with nonactivated alkenes. The desired reactions proceeded smoothly to afford the corresponding alkylated products in high yields with low catalyst loadings (0.2–0.3 mol%). This protocol is applicable to a continuous‐flow
Yasuhiro Yamashita, Tomoya Hisada, Yuki Sato, Shū Kobayashi   +3 more
wiley   +1 more source

Shell Petroleum Co. Awards [PDF]

, 1953

openalex   +1 more source

Treatment of wastewater from petroleum industry: current practices and perspectives

Environmental science and pollution research international, 2019
Sunita Varjani, R. Joshi, V. K. Srivastava, H. Ngo, Wenshan Guo   +4 more
semanticscholar   +1 more source

Balsam-Pear-Skin-Like-Structure Polyvinylidene Fluoride/Ethylene-Vinyl Alcohol Fibrous Membrane for Highly Efficient Oil/Water Separation Through One-Step Electrospinning. [PDF]

Polymers (Basel)
Jiang Q, Mo J, Han S, Liu X, Qu B, Xie J, Wang X, Zhao J.   +7 more
europepmc   +1 more source

Tunable Preparation of β‐Substituted Alkenoate Esters via Radical Alkenylation of C(sp3)–H Bonds with Allenoates

Advanced Synthesis &Catalysis, EarlyView.
Abstract A photocatalytic strategy for the radical alkenylation of aliphatic C(sp3)–H bonds with 2,3‐allenoate esters is described. The protocol takes place upon irradiation of the reaction mixture in the presence of the decatungstate anion, which triggers C−H cleavage in the chosen aliphatic substrates.
Alexandra Jorea, Roberto Chessa, Davide Ravelli   +2 more
wiley   +1 more source