作者:Jarle Holt、Trygve Andreassen、Jan M. Bakke、Anne Fiksdahl
DOI:10.1002/jhet.5570420213
日期:2005.3
the first preparation of 3-nitro-4-pyridyl isocyanate 9 and 5-nitro-2-pyridyl isocyanate 18. They were formed by Curtius rearrangement of the corresponding acyl azides 8 and 17, prepared from methyl 3-nitro-4-pyridinecarboxylate 6 via the hydrazide 7 and 5-nitro-picolinic acid 16, respectively. The substrates 6 and 16 were generated by nitration of methyl 4-pyridinecarboxylate 5 and nitration and oxidation
我们在此报告异氰酸3-3-硝基-4-吡啶基酯9和异氰酸5-硝基-2-吡啶基酯18的首次制备。它们是由相应的酰基叠氮化物的Curtius重排而形成8和17,从3-硝基-4-吡啶羧酸甲酯制备6 经由酰肼7和5-硝基-吡啶甲酸16分别。通过硝化4-吡啶甲酸甲酯5和硝化并氧化2-甲基吡啶14来生成底物6和16。3-硝基-4-吡啶基异氰酸酯9可以保存在干燥溶液中,并且在室温下稳定数周,而5-硝基-2-吡啶基异氰酸酯18的稳定性较差,应立即用于合成目的。