2,3-Bis(chloromethyl)-1,4-naphthoquinone reacts with primary nitroalkanes in a one-pot synthesis to give a series of anthraquinones bearing two n-alkyl substituents at C-2 and C-3 in good yields. The reaction is shown to proceed by two consecutive SRN1 processes followed by base-promoted nitrous acid elimination, electrocyclic ring-closure and dehydrogenation. In comparison with the classical Diels-Alder reaction, the advantage of this route is the simplicity of starting-material preparation.
2,3-双(
氯甲基)-
1,4-萘醌与一元硝基烷在一锅合成中反应,生成一系列在C-2和C-3位具有两个n-烷基取代基的
蒽醌,收率良好。反应经过两个连续的SRN1过程,然后是碱催化的
亚硝酸根消除、电环闭合和脱氢反应。与经典的戴尔斯-阿尔德反应相比,这种路线的优势在于起始材料制备的简便性。