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594306435(金币+10, 翻译EPI+1): 谢谢 2011-04-14 14:01:30
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The compound 2 was prepared with "three step -one pot law" method by taking (1) as the substrate reacted separatelty with benzaldehyde derivative and heterocyclic ring fragrant aldehyde.In this method ,the experiment operation was simplified, the laboratory procedure was reduced and the production rate was improved.The intramolecular ring-closing reaction happend within the compound 2 under phosphoric acid (PPA), gaining new closed loop product c and the d structure with 55.4~79.6% total recoveries through IR, 1H NMR, MS and the ultimate analysis confirmation. |
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