3-Cyano- and 3-(alkoxycarbonyl)spiro[2-pyrazoline-5,1’-cyclopropane] and 5-phenylspiro[1-pyrazoline-3,1’-cyclopropane] undergo unusual transformations into 3(5)-substituted 5(3)-(2-hydroperoxyethyl)pyrazoles in the presence of atmospheric oxygen. The conditions for the formation of hydroperoxides (e.g., in oxygen-saturated solutions of spiro[2-pyrazoline-5,1’-cyclopropanes] in CHCl3) and their conversion into (2-hydroxyethyl)pyrazoles or the corresponding nitrates under the action of nitrosating reagents were considered.
3-
氰基和 3-(烷氧羰基)螺[2-
吡唑啉-5,1'-
环丙烷]和 5-苯基螺[1-
吡唑啉-3,1'-
环丙烷]在大气氧存在下会发生不寻常的转化,变成 3(5)- 取代的 5(3)-(2- 氢过氧乙基)
吡唑。研究考虑了形成氢过氧化物的条件(例如在
CHCl3 中螺[2-
吡唑啉-5,1'-
环丙烷]的氧饱和溶液中),以及在
亚硝酸化试剂作用下将其转化为(2-羟乙基)
吡唑或相应
硝酸盐的条件。