Unusual formation of hydroperoxides in the reactions of substituted spiro[pyrazolinecyclopropanes]
作者:I. V. Kostyuchenko、G. P. Okonnishnikova、E. V. Shulishov、Yu. V. Tomilov
DOI:10.1007/s11172-005-0110-1
日期:2004.10
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。