Umehara A, Ueda H, Tokuyama H (November 2016). "Condensation of Carboxylic Acids with Non-Nucleophilic N-Heterocycles and Anilides Using Boc2O". The Journal of Organic Chemistry. 81 (22): 11444–11453. doi:10.1021/acs.joc.6b02097. PMID27767302.
Umehara A, Ueda H, Tokuyama H (November 2016). "Condensation of Carboxylic Acids with Non-Nucleophilic N-Heterocycles and Anilides Using Boc2O". The Journal of Organic Chemistry. 81 (22): 11444–11453. doi:10.1021/acs.joc.6b02097. PMID27767302.