Unprecedented two-step synthesis of symmetrical diarylamines from 2-alkyl-1,3-dinitropropanes
作者:Roberto Ballini、Luciano Barboni、Cristina Femoni、Guido Giarlo、Alessandro Palmieri
DOI:10.1016/j.tetlet.2006.02.027
日期:2006.4
This letter reports a new, two-step synthesis of symmetrical diarylamines from 1,3-dinitropropanes, by their reaction with acrolein under basic conditions (Al2O3, neat), followed by aromatisation of the obtained 2,4-dinitrocyclohexanols, through their treatment with four equivalents of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), in acetonitrile as a solvent, and warming overnight at 60 °C.
这封信报道了在碱性条件下(Al 2 O 3,纯净)与丙烯醛反应,由1,3-二硝基丙烷合成对称的二芳基胺的新的两步合成方法,然后将所得的2,4-二硝基环己醇进行芳构化。用四当量的1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)在乙腈中作为溶剂处理,并在60°C加热过夜。