Synthesis
To a stirred solution of 2-methyl-thiazole-5-carboxylic acid ethyl ester (1.3 g, 8.0 mmol) in dioxane (12 mL) at room temperature was added NaOH (2N, 12 mL). After 1 h the reaction mixture was neutralized with HCl (IN, 12 mL), then filtered and the collected solid dried in vacuo to give 2-methyl-1,3-thiazole-5-carboxylic acid (758 mg, 70percent) as an off white solid.
References
[1] Journal of the American Chemical Society, 2016, vol. 138, # 44, p. 14639 - 14649
[2] Patent: WO2010/127974, 2010, A1. Location in patent: Page/Page column 43; 44
[3] Patent: WO2018/160878, 2018, A1. Location in patent: Page/Page column 279
[4] Chemische Berichte, 1940, vol. 73, p. 1240,1252
[5] Australian Journal of Chemistry, 2004, vol. 57, # 6, p. 599 - 604
