Refernces
10.1021/ja0401702
The study presents the first total syntheses of the monoterpene alkaloids (-)-incarvilline, (+)-incarvine C, and (-)-incarvillateine, which are natural compounds with potent analgesic activity. The synthesis strategy utilized 6-epi-incarvilline as a common precursor, constructed through a three-component coupling reaction and a reductive Heck-type reaction to form the cyclopentanone and perhydro-2-pyrindine skeletons, respectively. Additionally, the study investigated the topochemically controlled [2 + 2] photodimerization of cinnamic acid derivatives to construct the 1,2,3,4-tetrasubstituted cyclobutane ring specific to (-)-incarvillateine. Various chemicals were employed, including (4S)-4-siloxy-2-cyclopenten-1-one, organozinc reagents, iodomethane, N-Boc-tosyl amide, and palladium catalysts, among others, to achieve the desired synthetic transformations and construct the complex molecular frameworks of the target alkaloids. These chemicals served the purpose of facilitating specific reactions and transformations necessary to synthesize the target compounds, ultimately allowing for the establishment of their structures and absolute configurations.
10.3390/molecules24244531
This research aimed to investigate the anti-inflammatory potential of a series of eighteen ring-substituted N-arylcinnamanilides, which were previously known for their antimicrobial activity. The study focused on determining the molecular structure of (2E)-N-(2-bromo-5-fluorophenyl)-3-phenylprop-2-enamide using single-crystal X-ray analysis and assessing the compounds' ability to attenuate lipopolysaccharide-induced NF-κB activation, a key factor in inflammation. The chemicals used in the synthesis process included cinnamic acid, phosphorus trichloride, and various aniline derivatives. The conclusions drawn from the study indicated that most of the tested compounds showed significant attenuation of NF-κB activation, with some being more potent than the parent cinnamic acid. Notably, (2E)-N-[2-chloro-5-(trifluoromethyl)phenyl]-3-phenylprop-2-enamide, (2E)-N-(2,6-dibromophenyl)-3-phenylprop-2-enamide, and (2E)-N-(2,5-dichlorophenyl)-3-phenylprop-2-enamide demonstrated the highest inhibition effect at a concentration of 2 μM, showing similar effectiveness to the reference drug prednisone. The study suggested that the anti-inflammatory activity was positively influenced by di-substitution on the C(2,5)′ or C(2,6)′ positions with lipophilic and bulky moieties, leading to a non-planar configuration of the entire system.
10.1055/s-2003-36844
The research investigates π-deficient 2-(arylsulfonyl)ethyl esters as protecting groups for carboxylic acids. The study explores the synthesis, protection, and deprotection processes of various π-deficient 2-(arylsulfonyl)ethyl groups. Key chemicals involved include thiophenols, 2-bromoethanol, H2O2, NaHCO3, MnSO4·H2O, EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride), DMAP (4-dimethylaminopyridine), and various carboxylic acids such as hydrocinnamic acid and trans-cinnamic acid. The researchers optimized the reaction conditions for both the protection and deprotection steps, finding that the 2-[3,5-bis(trifluoromethyl)phenylsulfonyl]ethyl group is particularly effective and easily removed under mild basic conditions using aqueous NaHCO3. The study highlights the efficiency, high yields, and mild reaction conditions of this new protecting group, making it a promising alternative to existing carboxylic acid protecting agents.
10.1134/S1070363215120154
Chloroacetic Acid is a halogenated carboxylic acid used to form 1-(chloroacetoxy)germatrane. Cinnamic Acid is an aromatic carboxylic acid used to form 1-(benzylideneacetato)germatrane. 2-Fluorobenzoic Acid is a fluorinated aromatic carboxylic acid used to form 1-(2'-fluorobenzoyloxy)germatrane. 3-Bromobenzoic Acid is a brominated aromatic carboxylic acid used to form 1-(3'-bromobenzoyloxy)germatrane. 3-Hydroxybenzoic Acid is a hydroxylated aromatic carboxylic acid used to form 1-(3'-hydroxybenzoyloxy)germatrane. 3-Ethoxybenzoic Acid is an ethoxylated aromatic carboxylic acid used to form 1-(3'-ethoxybenzoyloxy)germatrane. These acids react with 1-germatranol hydrate to form the corresponding 1-acyloxygermatranes. The nature of the substituent (R) on the carboxylic acid affects the yield and properties of the resulting product.
10.1081/SCC-100106202
The research focuses on the condensation of o-phenylenediamine sulfate with cinnamic acids to yield 2-styrylbenzimidazoles. The experiments were conducted by refluxing o-phenylenediamine sulfate with various cinnamic acids in ethylene glycol, which resulted in the formation of the target compounds in excellent yields. The reactants included o-phenylenediamine sulfate and different substituted cinnamic acids. The analyses used to confirm the authenticity and structure of the synthesized compounds included melting point determination, thin-layer chromatography (TLC), infrared (IR) spectroscopy, proton and carbon-13 nuclear magnetic resonance (1H-NMR and 13C-NMR), mass spectrometry, and elemental analysis, which were compared with literature values and previous results from similar condensation reactions.
Xi
