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A series of 2,2?-dialkyl bis(3-methyl-6,7-dihydrobenzofuran-4(5H)-one) derivatives was prepared through H_2SO_4·SiO_2 catalyzed condensation reaction under solvent-free conditions as potential anti-tumor agents. All of them were characterized by ESI-MS, IR and NMR spectra. Meanwhile, the single crystal of the target compound(4b), C_(24)H_(28)O_4, was also obtained and determined by X-ray crystallography. Crystal data: triclinic system, space group P1, a = 8.463(10), b = 9.612(11), c = 13.828(15) ?, α = 74.29(5), β = 80.93(5), γ = 69.90(3)°, V = 1014(2) ?3, Z = 2, F(000) = 408, Dc = 1.246 g/cm3, μ = 0.084 mm~(-1), R = 0.0883 and wR = 0.2440 for 4616 independent reflections(Rint = 0.1200) and 3490 observed ones(I > 2σ(I)).
A series of 2,2? -dialkyl bis (3-methyl-6,7-dihydrobenzofuran-4 (5H) -one) was prepared through H_2SO_4 · SiO_2 catalyzed condensation reaction under solvent-free conditions as potential anti-tumor agents All of them were characterized by ESI-MS, IR and NMR spectra. Meanwhile, the single crystal of the target compound (4b), C_ (24) H_ (28) O_4, was also obtained and determined by X-ray crystallography. Crystal Data: triclinic system, space group P1, a = 8.463 (10), b = 9.612 (11), c = 13.828 (15) ?,? = 74.29 (5),? = 80.93 (5),? = 69.90 ), V = 1014 (2)? 3, Z = 2, F (000) = 408, Dc = 1.246 g / cm3, μ = 0.084 mm -1, R = 0.0883 and wR = 0.2440 for 4616 independent reflections (Rint = 0.1200) and 3490 observed ones (I> 2σ (I)).