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| 我们以(1)为底物，与苯甲醛衍生物经“三步一锅法” 合成化合物a，所谓“三步一法锅”是化合物(1)和亚磷酸三乙酯反应制备的磷Ylide(20)不需分离，直接与苯甲醛衍生物在NaH/DMF反应体系中通过Wittig-Horner反应和碱性水解反应生成化合物x，该方法简化了实验操作，缩短实验步骤。然后化合物x用PPA作为闭环试剂，在130-150℃条件下发生分之内闭环反应，以55.4~79.6%的总收率得到新型的闭环产物b。 |
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594306435(金币+15, 翻译EPI+1): 谢谢 2011-04-07 07:45:57
| We synthesized compounds a with benzaldehyde derivatives and (1) as substrate by "three-step one-pot", the so-called "three-step-one-pot" is a compound (1) and triethyl phosphite was prepared in phosphate Ylide (20) without separation, Directly with benzaldehyde derivatives in NaH / DMF reaction system by Wittig-Horner reaction and the reaction of alkaline hydrolysis of compound x, This approach simplifies the experimental operation and shorten the test procedure. Then use the PPA as a closed loop compound x reagent, Under the conditions of the closed loop response per occurrence at 130-150 ℃, Closed by the new product b with the total yield 55.4 to 79.6%. |
2楼2011-04-07 00:52:09
