Propylphosphonic acid anhydride–mediated amidation of Morita–Baylis–Hillman–derived indolizine-2-carboxylic acids. - Sekgota, Khethobole C; Isaacs, Michelle; Hoppe, Heinrich C; Seldon, Ronnett; Warner, Digby F; Khanye, Setshaba D; Kaye, Perry T (Journal of Chemical Research, 2021)