Regioselective Alkylation of 5-Substituted Tetrazoles with 3-Chlorobut-2-en-1-ol in Acid Medium
作者:S. A. Egorov、M. A. Ishchenko、N. A. Kirilov、R. S. Iskhakov
DOI:10.1134/s1070428019040183
日期:2019.4
was studied in 1,2-dichloroethane, chlorofom, and methylene chloride in the presence of boron trifluoride—diethyl ether complex, as well as in trifluoroacetic acid and in ethyl acetate in the presence of sulfuric acid. The reaction in 1,2-dichloroethane catalyzed by BF3 · Et2O gave 70–80% of the alkylation products containing no less than 99% of the 2-substituted isomer.
在三氟化硼的存在下,在1,2-二氯乙烷,氯仿和二氯甲烷中研究了3-R-四唑(R = H,Me,Ph)与3-氯丁-2-烯-1-醇的烷基化-乙醚络合物,以及在硫酸存在下的三氟乙酸和乙酸乙酯溶液中。在BF 3 ·Et 2 O催化下的1,2-二氯乙烷中反应,得到70-80%的烷基化产物,其中不少于99%的2-取代的异构体。