4-Imidazol-1-yl-butane-1-sulfonic acid or a novel liquid salt? The NMR analysis and dual solvent-catalytic efficiency for one-pot synthesis of xanthenes

• Main Authors: Khaligh, Nader Ghaffari, Lim, Shi Teng, Ong, Chiu Ling, Johan, Mohd Rafie, Juan, Joon Ching
• Format: Article
• Published: Elsevier 2019
• Subjects: Q Science (General); QD Chemistry
• Online Access: http://eprints.um.edu.my/20066/; https://doi.org/10.1016/j.molliq.2019.01.041

The reaction of the equimolar mixture of imidazole and 1,4-butane sultone was performed at 90 °C in ethylbenzene for 12 h, and the structure of the product was investigated by the NMR analysis in CD3OD and DMSO‑d6. This work demonstrated that 4-imidazol-1-yl-butane-1-sulfonic acid could not be obtai...