An efficient telescoped method for synthesis of 3-phenyl-10-(2,3,4-trimethoxyphenyl)-9,10-dihydro-4H,8H-pyrano[2,3-f]chromene-4,8-dione was elaborated. The presented protocol includes the one-pot multicomponent reaction 7-hydroxy-3-phenyl-4H-chromen-4-one, 2,3,4-trimethoxybenzaldehyde and Meldrum’s acid. Advantages this are application readily available starting reagents, atom economy easy proc...

An efficient and convenient method for synthesis of 2,6-bis (4-(dialkylamino) styryl)-4H-pyran-4-one starting from 4- (dialkylamino) benzaldehyde with 2,6-dimethyl-4H-pyran-4-onein the presence of MeONa as the base was described. Additionally, preparation of novel compounds with bis-DCM-type skeleton for application in organic light-emitting diodes was developed via reactio...

Defect qubits in 4H-SiC are outstanding candidates for numerous applications the rapidly emerging field of quantum technology. Carbon clusters can act as emission sources that may appear after thermal oxidation or during irradiation, which kicks out carbon atoms from their sites. These fluorescent could interfere with already established vacancy-related generated irradiation techniques. In this...

The high quality of crystal growth and advanced fabrication technology silicon carbide (SiC) in power electronics enables the control optically active defects SiC, such as vacancies (VSi). In this paper, VSi are generated hexagonal SiC (4H) samples through ion implantation nitrogen or (and) aluminum, respectively n- p-type dopants for SiC. presence within is studied using cathodoluminescence at...

The focus of our study is the synthesis and biological activity evaluation of a series of 4H-Pyran compounds and schiff bases fused 4H-Pyran derivatives which are known to possess a wide variety of biological activities. In this paper at first a simple and efficient one-pot synthesis of 4H-Pyran s from the three-component reaction between malononitrile, aldehydes, and active methylene compounds...

The focus of our study is the synthesis and biological activity evaluation of a series of 4H-Pyran compounds and schiff bases fused 4H-Pyran derivatives which are known to possess a wide variety of biological activities. In this paper at first a simple and efficient one-pot synthesis of 4H-Pyran s from the three-component reaction between malononitrile, aldehydes, and active methylene compounds...

Aromatic unsaturated 4,4’-bis-[5(4H)-oxazolones] have been prepared and their structural properties discussed. Metallation studies of these substrates towards palladium(II) acetate were also investigated.

A facile and highly efficient protocol was applied successfully to synthesize 4H-pyrimido[2,1,b]benzimiazoles and 4H-pyrimido[2,1,b]benzothiazoles through one-pot three-component cyclocondensation reactions of 2-aminobenzimidazole or 2-aminobenzothiazole with dimedone and aromatic aldehydes in the presence of guanidinium chloride under solvent-free conditions. The reactions us...

Abstract Introduction CPAP/APAP therapy remains the gold standard for treating OSA. Unfortunately, many patients struggle with long term adherence. Patients frequently have only 90 days to meet Medicare criteria adherence assure coverage of their therapy. Lack often leads reevaluation, and a new trial CPAP/APAP. Despite all these efforts significant number are ultimately unsuccessful. When this...