Esters of substituted 2,3,7-triazabicyclo[3.3.0]oct-3-ene-4-carboxylic acids react with acetone in the presence of hydrogen chloride (bromide) affording esters of substituted 2-(1,1-dimethyl-3-oxobutyl)-2,3,7-triazabicyclo[3.3.0]oct-3-ene-4-carboxylic acids. Reactions of esters of substituted 2,3,7-triazabicyclo[3.3.0]octa-1(5),3-diene-4-carboxylic acids with 1-adamantanol in trifluoroacetic acid resulted in esters of substituted 2-(1-adamantyl)- 2,3,7-triazabicyclo[3.3.0]octa-1(5),3-diene-4-carboxylic acids.
带取代基的2,3,7-三
氮杂双环[3.3.0]辛-3-烯-4-
羧酸的酯在
盐酸(
溴化氢)的存在下与
丙酮反应,生成带取代基的2-(
1,1-二甲基-3-氧代丁基)-2,3,7-三
氮杂双环[3.3.0]辛-3-烯-4-
羧酸的酯。带取代基的2,3,7-三
氮杂双环[3.3.0]辛-1(5),3-二烯-4-
羧酸的酯与1-阿达曼醇在
三氟乙酸中反应,生成带取代基的2-(1-阿达曼基)-2,3,7-三
氮杂双环[3.3.0]辛-1(5),3-二烯-4-
羧酸的酯。