Results 11 to 20 of about 2,944,243 (309)

Asymmetric Synthesis of Cycloartobiloxanthone. [PDF]

Org Lett
Herein, we report the first asymmetric synthesis of cycloartobiloxanthone, a polycyclic dihydroxanthone natural product. Our convergent synthesis employs a rhodium-catalyzed C-H insertion reaction to construct the key fused tricyclic core with high enantioselectivity.
Hsieh CE, Dishman SN, Dimirjian CA, Ung L, Dorado TE, Molas JC, Maldonado JA, Fettinger JC, Shaw JT.   +8 more
europepmc   +3 more sources

Synthesis of pyran and related natural products [PDF]

, 2012
This study was aimed at preparing dihydropyrans (DHPs) for the synthesis of 2,6-disubstituted tetrahydropyrans (THPs) in a diastereoselective manner. In an attempt to develop a novel methodology for the synthesis of DHPs from δ-hydroxy-β-ketoester and ...
Yeung, Bun
core   +6 more sources

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

Asymmetric synthesis of nortropanes via Rh-catalysed allylic arylation [PDF]

, 2022
Tropane derivatives are extensively used in medicine, but catalytic asymmetric methods for their synthesis are underexplored. Here we report Rh-catalysed asymmetric Suzuki-Miyaura type cross coupling reactions between a racemic N-Boc-nortropane-derived ...
Stephen P., Fletcher, Yan, Zhang, F. Wieland, Goetzke, Kirsten E., Christensen   +3 more
core   +2 more sources

Asymmetric Synthesis of Ageliferin [PDF]

Journal of the American Chemical Society, 2011
We describe herein an asymmetric synthesis of ageliferin. A Mn(III)-mediated oxidative radical cyclization reaction was used as the key step to construct the core skeleton of this pyrrole-imidazole dimer. This approach resembles the biogenic [4 + 2] dimerization in an intramolecular fashion.
Xiao, Wang, Zhiqiang, Ma, Jianming, Lu, Xianghui, Tan, Chuo, Chen   +4 more
openaire   +2 more sources

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