Addition of 9-nitroanthracene to solutions of sodio malonic ester, sodio methylmalonic ester, sodium 2-propanenitronate, and sodio malononitrile in dimethyl sulfoxide and subsequent dilution with water and acidification afford 10-dicarbethoxymethyl-, lo-(1, l- dicarbethoxyethy1)-, 10-(2-nitro-2-propyl)-, and lO-dicyanomethyl-9-nitro-9, lO- dihydroanthracenes (7a-d), respectively. The results of nmr studies of 7a are consistent ...
