3-Nitrochromenes are readily converted into 4-phosphorylchromenes on treatment with dialkyl phosphite in the presence of triethylamine in 60–70% yield. This method provides a general method for the preparation of alkenyl phosphonates from nitroalkenes and dialkyl phosphite.
在
三乙胺存在下,用
亚磷酸二烷基酯处理时,3-
硝基苯醌很容易转化为4-
磷酰基苯醌,产率为60-70%。该方法提供了由硝基烯烃和
亚磷酸二烷基酯制备链烯基
膦酸酯的一般方法。