作者:G.V. Shustov、N.B. Tavakalyan、R.G. Kostyanovsky
DOI:10.1016/s0040-4020(01)96503-2
日期:1985.1
chlorination of a 1-phenylpyrazolidin-5-one 8 gave phenylazoisovaleric esters 9a,b. Stable N-chlorohydrazines were obtained from bicyclic hydrazines; viz. the 2-chloro-1,2-diazabicyclo [2.2.2]octan-3-one 12 and 7-chloro-1,7-diazabicyclo[2.2.1]heptane 16. The restricted inversion of N(7) in 16 and its 1-methyl quaternary salt 21 were observed in the 13C-NMR spectra. The acyclic N-chloro-hydrazinium salt
讨论了决定N-氯肼动力学和热力学稳定性的因素。无环N-氯肼仅以三烷基氯化二氮3a,b的形式存在。通过酰肼基中间体将2-酰基-1,1-二甲基肼6a,b氯化,得到1,4-二酰基-2,3-二甲基六氢-1,2,4,5-四嗪7a,b,并且氯化1-苯基吡唑啉丁-5-酮8得到苯基偶氮异戊酸酯9a,b。从双环肼获得稳定的N-氯肼;即 2-氯-1,2-二氮杂双环[2.2.2] octan-3-one 12和7-氯-1,7-二氮杂双环[2.2.1]庚烷16。N(7)在16中的受限反演在13 C-NMR光谱中观察到了其1-甲基季盐21。分离出无环的N-氯肼盐25。