Synthetic Communications最新文献

Simple, environmentally benign and metal free one pot strategy has been used for the synthesis of 4-iodo-3-phenylbenzo[b][1,6]naphthyridine from O-alkynylquinolinyl aldehydes with tert-butyl amine and iodine through imine formation in good to excellent yield at room temperature in aerobic and mild conditions. The beauty of this reaction is the imine formation and cyclization in the same reaction pot. Due to presence of iodine in product, it can be useful for further reaction and can be valuable synthon for new organic compounds.

The present work aimed to synthesize different substituted glycinamide derivatives. A series of novel substituted 2-((N-benzyl-5-bromo-2-methoxyphenyl) sulfonamide) and their glycinamide derivatives (5a–5p) were synthesized. We developed a simple strategy for synthesizing functionally diverse sulfonamide and glycinamide derivatives through a series of steps. A series of molecules containing amide derivatives were designed and synthesized, and their structures were elucidated and confirmed by1H NMR, 13 C NMR, LCMS, and their purity was checked using HPLC. The synthesized compounds were screened for anticancer activity against A-549 and A431 cancer cell lines by MTT assay and then docking studies were carried out to understand the molecular interactions. The preliminary bioassay suggests that most compounds showed remarkable anti-proliferation activity. Gefitinib was used as a positive control. The compounds 5g and 5f were active compared with Gefitinib in both the cell lines.

The chemical reactivity of 3-formylchromones toward several carbon and nitrogen nucleophiles is collected in this review. Certain annulated chromones and 3-heteroaryl chromones were synthesized. A diversity of three component reactions including 3-formylchromones was also summarized.

An eco-friendly, metal-free approach for synthesizing dihydrobenzo[b][1,8]naphthyridine derivatives has been established. This method employs ortho-chloroquinolin-α,β-unsaturated ketones as dipolarophiles and acyclic enaminones as amphiphilic nucleophiles, enabling a formal [3 + 3] annulation reaction under phase-transfer catalysis to offed the targeted products. It boasts transition-metal-free conditions, broad functional group compatibility, and straightforward operational procedures.

1,4,5,8-tetrasubstituted dihyroanthracene-based triptycene trisquinones (TT) molecules, THAO-TT and tris(THAO)-TT, were synthesized by Diels–Alder reaction between TT and 1,4,5,8-tetrakis(hexyloxy)anthracene to produce the extended triptycene derivatives containing electron-accepting functionality. The prepared THOA-TT and tris(THOA)-TT exhibited excellent thermal stability owing to the rigid TT framework. The optical and redox properties of THOA-TT and tris(THOA)-TT were controlled by the homoconjugation between the benzoquinone units and the peripheral units through the connecting methine groups.

Seventeen new highly fluorinated phosphoramidates containing alkylamino moieties of the type (R_FO)₂P(O)NHR (R = CH₂CH₂CH₃, (CH₂)₃CH₃, (CH₂)₄-CH₃, CH(CH₃)₂, C₆H₁₁, CH₂CH₂-C₆H₅, CH₂-C₆H₅ or C₆H₅; R_F = CH₂CF₃, CH₂C₂F₅ or CH₂CH₂C₆F₁₃) were synthesized. These compounds were obtained through the reaction of primary amines with bis(polyfluoroalkyl)phosphites as phosphorylating agents, using molecular iodine as a mild catalyst and in the presence of H₂O_2.This method was chosen out of various literature common methods, which were thoroughly investigated using ³¹P NMR spectroscopy. In addition, the variation in reaction rates among different phosphites was studied and compared with previous research findings. The title phosphoramidates were fully characterized using multinuclear (¹H,¹³C,³¹P, and ¹⁹F) NMR, IR, and HRMS techniques.

Pyridines and its derivatives are an important class of heterocyclic compounds of low molecular weight. They have been used in the treatment of a various diseases like cardiovascular disease, antioxidant, antibacterial, anti-tubercular, anticancer, anticoagulant, etc. In 1882, Arthur Hantzsch reported pyridine derivative synthesis using different aldehydes, 2 molecules β-keto ester and ammonium acetate to give a Hantzsch ester or 1,4-dihydropyridine derivatives. This review article focuses on different protocols for Hantzsch reaction using different catalysts like β-cyclodextrin–polyurethane polymer (β-CDPU), chitosan nanoparticles (NPs), salicylic acid, p-toluenesulfonic acid (p-TSA), alginic acid, Fe-TUD-1, PdRuNi@GO, Ceric Ammonium Nitrate (CAN), sulfate polyborate, etc. for the synthesis of pyridine derivatives.

Sugar nucleotides are essential substrates used for synthesizing bioactive oligosaccharides in enzymatic reactions, however, their preparation via chemical and enzyme reactions is challenging. Therefore, we investigated the synthesis of sugar nucleotides under optimal conditions using a facile one-step reaction. Seven sugar nucleotides were synthesized via an optimized one-step reaction in 40–80% yield, exhibiting a preference for 1,2-trans glycoside. Moreover, a gram-scale synthesis of UDP-galactose resulted in a 46% (578 mg) yield.

Reaction of 9-fluorene propargylic alcohols and substituted-2-hydrazinopyridine using BF₃·OEt₂ as a Lewis acid catalyst afforded 9-fluorenlidene appended 2-hydrazinopyridine imine derivatives has been developed. The scope of the reaction is demonstrated by selecting a range of fluorene propargylic alcohols and substituted 2-hydrazinopyridine imines. All the synthesized molecules were characterized using various spectroscopic and analytical techniques including ¹H NMR,¹³C NMR, and Mass spectrometry. A plausible reaction mechanism for forming title compounds via propargylic allenyl carbocation is postulated. The synthetic utility of products thus formed is demonstrated by utilizing Suzuki coupling.