Results 1 to 10 of about 127,998 (247)

Preparation and DFT studies of chiral Cu (I)-complexes of biphenyl bisoxazolines and their application in enantioselective Kharasch–Sosnovsky reaction

Scientific Reports, 2022
Effect of a range of t-butyl perbenzoates bearing electron-withdrawing and electron-donating substitutions on the phenyl ring and HZSM-5 as a porous additive at 0 °C in enantioselective allylic C–H bond oxidation of cyclic and acyclic olefins in the ...
Saadi Samadi, Hamid Arvinnezhad, Sirwan Mansoori, Hadi Parsa   +3 more
doaj   +1 more source

Synthesis of novel phthalimido oxime pseudoesters and evaluation of their cytotoxicity [PDF]

Journal of the Serbian Chemical Society, 2020
A series of novel optically pure oxime pseudoesters derivatives were synthesized by the reaction of substitute keto oximes with various N-substituted α-amino acids chlorides in the presence of triethylamine and dichloromethane at 0°C, and their ...
Mehrez Asma, Chakroun Ibtissem, Mtat Dalila, Ben Mansour Hédi, Touati Ridha   +4 more
doaj   +1 more source

Copper-catalyzed synthesis of diarylamines using p-toluene sulfonamides and benzhydrol derivatives under homogeneous borrowing hydrogen conditions

Comptes Rendus. Chimie, 2020
Diarylamines were synthesized using p-toluene sulfonamides with benzhydrol derivatives in the presence of a copper/bisphosphine complex by Borrowing Hydrogen (BH) mechanism, yielding ${
Ashouri, Akram, Samadi, Saadi, Ahmadian, Masoud, Nasiri, Behzad   +3 more
doaj   +1 more source

Recent Advances in DMSO-Based Direct Synthesis of Heterocycles

Molecules, 2022
Besides serving as a low-toxicity, inexpensive and easily accessible solvent, dimethyl sulfoxide (DMSO) has also been extensively used as a versatile reagent for the synthesis of functionalized molecules.
Hai-Lei Cui
doaj   +1 more source

Nickel-catalyzed direct stereoselective α-allylation of ketones with non-conjugated dienes

Nature Communications, 2023
The development of efficient and sustainable methods for the construction of carbon-carbon bonds with the simultaneous stereoselective generation of vicinal stereogenic centers is a longstanding goal in organic chemistry.
Yi-Xuan Cao, Matthew D. Wodrich, Nicolai Cramer   +2 more
doaj   +1 more source

Synergistic Pd/Cu catalysis for stereoselective allylation of vinylethylene carbonates with glycine iminoesters: Enantioselective access to diverse trisubstituted allylic amino acid derivatives

Green Synthesis and Catalysis, 2021
We reported a synergistic Pd/Cu catalyzed enantioselective decarboxylative allylation of vinylethylene carbonates with glycine iminoesters, which provides facile access to non-proteinogenic diverse trisubstituted allylic amino acid derivatives in high ...
Miaolin Ke, Zhigang Liu, Ke Zhang, Sheng Zuo, Fener Chen   +4 more
doaj   +1 more source

Novel functional [4]helicenes through a photooxidation pathway. Investigation of the absorption and fluorescence in solution

Comptes Rendus. Chimie, 2021
Novel functional [4]helicenes have been designed and synthesized, in 54%–72% overall yields, through an operational and simple two-step photochemical approach starting from various p-substituted phenylacetonitriles, and were characterized by NMR ($^{1}$H,
Hafedh, Nesrine, Asghar, Basim H., Aloui, Faouzi   +2 more
doaj   +1 more source

Chemical asymmetric synthesis

Nature, 1989
Thalidomide comes in two forms: a left-handed compound which is a powerful tranquilizer, and a right-handed version which can disrupt fetal development causing severe handicap. As a necessary consequence of synthetic methods available in the early 1960s the two forms were present in equal proportions in the manufactured drug, with catastrophic ...
Brown, J, Davies, S
openaire   +2 more sources

2,4-Bis(arylethynyl)-9-chloro-5,6,7,8-tetrahydroacridines: synthesis and photophysical properties

Beilstein Journal of Organic Chemistry, 2021
Acridine derivatives have attracted considerable interest in numerous areas owing to their attractive physical and chemical properties. Herein, starting from readily available anthranilic acid, an efficient synthesis of 2,4-bis(arylethynyl)-9-chloro-5,6 ...
Najeh Tka, Mohamed Adnene Hadj Ayed, Mourad Ben Braiek, Mahjoub Jabli, Noureddine Chaaben, Kamel Alimi, Stefan Jopp, Peter Langer   +7 more
doaj   +1 more source

7-Cyano-15-methoxy[6]helicene through a photochemical pathway and investigation of its chiroptical and photophysical properties

Comptes Rendus. Chimie, 2021
7-Cyano-15-methoxy[6]helicene was synthesized, in 54% overall yield, through a short photochemical procedure including mild conditions and inexpensive reagents.
Hafedh, Nesrine, Asghar, Basim H., Aloui, Faouzi   +2 more
doaj   +1 more source