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lixiaod001(½ð±Ò+6,VIP+0): 12-2 17:40
lixiaod001(½ð±Ò+6,VIP+0): 12-2 17:40
| The present paper has made the improvement to the Wittig response post-processing, easy to crystallize the characteristic using the by-product triphenyl oxygen phosphorus, uses the heavy crystallization the first method after the majority of by-product triphenyl oxygen phosphorus, then uses the column to chromatographically analyze the chromatograph purification product. Not only we discover this method the silica gel and the resolver amount used are few, moreover the effect is very good, has certain environmental protection and the economic significance. |
2Â¥2009-11-28 14:56:25
lixiaod001
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3Â¥2009-11-30 17:13:09
lixiaod001
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4Â¥2009-12-02 17:40:14














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