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第 7 期 李贾东，等: 小粒径 Fe 3 O 4 磁粉的制备及其在有机合成中应用 ·1427·

表 4 催化反应时间 1181.
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点 130~131 ℃。 HNMR (400 Hz, CDCl 3 ), δ: [6] He K, Xu C Y, Zhen L, et al. Hydrothermal synthesis and
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105~106 ℃。 HNMR (400 Hz, CDCl 3 ), δ: 7.96~7.99 [8] Zou Tao (邹涛), Guo Canxiong (郭灿雄), Duan Xue (段雪), et al.
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m/Z: [M+H] 理论值 297.1347, 实际值 297.1347。 new, efficient, and reusable catalysts for the synthesis of quinoxalines
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CH 3 )。HRMS, m/Z: [M+H] 理论值 173.1034, 实际 Preparation and catalytic performance of Fe 3O 4 nanoparticles[J].
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