The author of 《3D QSAR-based design and liquid phase combinatorial synthesis of 1,2-disubstituted benzimidazole-5-carboxylic acid and 3-substituted-5H-benzimidazo[1,2-d][1,4]benzodiazepin-6(7H)-one derivatives as anti-mycobacterial agents》 were Sitwala, Nikum D.; Vyas, Vivek K.; Gedia, Piyush; Patel, Kinjal; Bouzeyen, Rania; Kidwai, Saqib; Singh, Ramandeep; Ghate, Manjunath D.. And the article was published in MedChemComm in 2019. Reference of Ethyl oxalyl monochloride The author mentioned the following in the article:
A 3D QSAR study was performed for the design of novel substituted benzimidazole derivatives as anti-mycobacterial agents. The anti-tubercular activity of the designed compounds was predicted using the generated 3D QSAR models. The designed compounds which showed better activity were synthesized as I [R = pyridin-3-yl, 3,4-(MeO)2C6H3, 4-BrC6H4, etc.] and II [R1 = H, PhCO, 4-MeOC6H4SO2, etc.] using the liquid phase combinatorial approach using a soluble polymer assisted support (PEG5000). The compounds were characterized by 1H-NMR, 13C-NMR, FTIR and mass spectrometry. HPLC anal. was carried out to evaluate the purity of the compounds It was observed that the synthesized compounds inhibited the growth of intracellular M. tuberculosis H37Rv in a bactericidal manner. The most active compound, II [R1 = H] displayed an MIC value of 0.0975 μM against the Mtb H37Rv strain in liquid cultures. The lead compound was also able to inhibit the growth of intracellular mycobacteria in THP-1 macrophages. In the experiment, the researchers used Ethyl oxalyl monochloride(cas: 4755-77-5Reference of Ethyl oxalyl monochloride)
Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Reference of Ethyl oxalyl monochloride
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