作者:S. E. Morozova、A. V. Komissarov、K. A. Esikov、V. Yu. Zubarev、A. A. Malin、V. A. Ostrovskii
DOI:10.1007/s11178-005-0057-6
日期:2004.10
Linear polynuclear tetrazole-containing compounds were synthesized. Alkylation of 5-[ω-(5-phenyl-2-tetrazolyl)alkyl]tetrazoles with ethyl bromoacetate and chloroacetamide gave the corresponding esters and amides. Treatment of the latter with tetrachlorosilane-sodium azide afforded compounds containing three tetrazole rings linked through polymethylene bridges. Acid ionization constants of the products possessing an NH-tetrazole ring (pK a = 2.9–3.2) and the corresponding carboxylic acids (pK a = 2.9–3.1) in aqueous methanol were determined by potentiometric titration.
合成了含线性多核四唑的化合物。5-[ω-(5-苯基-2-四唑基)烷基]四唑与溴乙酸乙酯和氯乙酰胺的烷基化反应产生了相应的酯和酰胺。后者与四氯硅烷-叠氮化钠反应,产生了含有三个通过聚亚甲基桥连接的四唑环的化合物。通过电位滴定法测定了含NH-四唑环(pK a = 2.9–3.2)的产物和相应的羧酸(pK a = 2.9–3.1)在水甲醇中的酸电离常数。