Letters in Organic Chemistry - Volume 20, Issue 10, 2023

The conformational features of vinyl isocyanate (1) and vinyl azide (2) have been analyzed using G4MP2, CCSD(T)/6-311+G**, B3LYP/6-311+G** and LC-ωPBE/6-311+G** theory levels. Published experimental data indicate that the stability of the cis-isomer of vinyl azide (2) is more than the trans-isomer. This is consistent with the findings attained using G4MP2 and LC-ωPBE/6- 311+G** levels, whereas B3LYP/6-311+G** and C Read More

Artificial enzyme mimics have lately sparked a lot of attention since they offer a lot of benefits over natural enzymes. Because of their proteic origin and tailorable structures, self-assembling peptides are ideal building blocks for the creation of artificial enzymes. Recently, a series of histidinebearing self-assembling peptides with β-sheet structures, which are selective for short-chain fatty acids, were described. In this Read More

Amphiphilic tri-arm star-shaped copolymers, poly(ethylene oxide)-b-poly(ε-caprolactone) PEO3-b-PCL3, with different poly (ε-caprolactone) (PCL) molecular weights were successfully synthesized by ring-opening polymerization (ROP). Firstly, the tri-arm star-shaped PEO3 was prepared by ROP of trimethylolpropane and ethylene oxide (EO). The ring-opening polymerization (ROP) of ε- caprolactone (CL) was initiated using the tri- Read More

A simple and efficient synthesis of pyrrolo[1,2-a]pyrazine using Schiff base formation, intramolecular cyclization (or N-alkylation), and Pictet–Spengler type reaction (hetero-aromatisation) has been developed. In this chemistry, metal-free, cost and time-effective processes have been highlighted to afford the complex nitrogenous scaffold using simple starting materials.

The development of efficient and eco-friendly synthetic processes or techniques for the synthesis of heterocyclic compounds is increasing enormously. Here, an environmentally friendly ionic liquid is used as an efficient catalyst for the synthesis of biologically important dihydropyrano [3,2- c] chromenes. This is because ionic liquids play an important role in green chemistry due to their distinctive properties, easy handli Read More

Anilinopyrimidines have a wide range of biological activities, including antibacterial, antifungal, and anticancer effects. They have a wide range of uses and opportunities due to their varied experimental preparation and study activities. This creates a lot of interest, experiments and analytical analyses are still being conducted to understand their medicinal chemistry better. According to their effects, which can include antifunga Read More

Various catalytic and non-catalytic organic transformations are carried out in glycerol media with superior efficiency over commonly employed organic solvents. The success of glycerol as a green media is due to its exceptional H-bonding properties, which result in enhanced reactivity in many organic transformations. In addition, its highly polar nature and non-toxic properties, recyclability, large availability as an organic Read More

Conductive clay–polymer nanocomposites were preparedvia the in situ polymerization of aminoacetophenone and/or aniline monomers (at initial “aminoacetophenone:aniline”) in the presence of polyhydroxy iron cation–modified montmorillonite (MMT-PIC). Fourier transform infrared spectroscopy analysis demonstrated the characteristic bands of the MMT-PIC polymers/copolymers. The morphological properties analy Read More

In this present investigation, efficient and general protocols for the synthesis of a series of imidazoles 4(a-p) derivatives have been developed by cyclocondensation of aromatic aldehydes, benzil and ammonium acetate in the existence of efficient [EMIm][BH3CN] ionic liquid catalyst under microwave condition in good to excellent yields (91-97%). The structures of the synthesized compounds have been confirmed by IR and Read More

Specific recognition at trace quantity levels of metal ions without using the costly analytical instrument and a tedious sample preparation method is an extensive concern for environmental monitoring and mitigation. Mercury(II) (Hg2+) has acute toxicity. The development of ion-selective fluorescence sensors for the selective detection of Hg2+ is an essential task to accomplish. The aim of this study is to detect Hg2+ in an Read More

During the process optimization of Lisdexamfetamine dimesylate, two process impurities were observed. Methods: These impurities remained a concern for commercialization and were isolated, on characterization, were found to be H-Lys-ε-Lys-d-amphetamine and other being its regio- isomer H-Lys-α-Lysd- amphetamine. The main target of this study was to synthesize reference compounds for HPLC analysis of these im Read More

The first synthesis of 2-bromogentisyl alcohol, a halogenated compound cytotoxicity to breast cancer cell line, was achieved in four steps. Key steps include (i) formylation of aromatic compound, (ii) bromination, (iii) demethylation and (iv) reduction. Compound 3 was prepared from 4- methoxyphenol (2) in 92% yield in the presence of MgCl2 and Et3N, then intermediate 4 was obtained by bromination of 3 in 78% yield. Read More