Preparation of di- and polynitrates by ring-opening nitration of oxetanes by dinitrogen pentoxide (N2O5)
作者:Peter Golding、Ross W Millar、Norman C Paul、David H Richards
DOI:10.1016/s0040-4020(01)87979-5
日期:1993.8
esters (I) by ring-opening nitration. The yields ranged from 73 to 88% for di-/trinitrates derived from oxetanes unsubstituted in the 2-position, to only 15 to 21% for oxetanes bearing such substituents. Although selective ring cleavage of oxetanes bearing non-hydroxylic substituents (epoxy (oxiranyl), spiro-oxetane and alkene) was not, in general, possible, selective nitration of hydroxyalkyloxetanes
十个带有各种取代基的氧杂环丁烷在氯化烃溶剂中与N 2 O 5反应,生成1,3-二硬脂酸酯(I)通过开环硝化作用。衍生自在2-位未被取代的氧杂环丁烷的二/三硝酸盐的产率为73-88%,而带有此类取代基的氧杂环丁烷的产率为15-21%。虽然带有非羟基取代基(环氧(环氧乙烷基),螺-氧杂环丁烷和烯烃)的氧杂环丁烷的选择性环裂解是不可能的,但通常来说,在用于产生可用作前体的硝基-甲基氧杂环丁烷的条件下,可以实现羟烷基氧杂环丁烷的选择性硝化。高能聚醚。与代表性环氧化物的半定量反应性比较表明,氧杂环丁烷对N 2 O 5的反应性较低,这是由于其较低的环应变所预期的。