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yidiniaoren铜虫 (正式写手)
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[求助]
求助翻译一段话 英译汉 关于合成方面的
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| A method for the prepn. of Sucralose was designed. A reaction of sucrose with trityl chloride and acetylation provided TRISPA [i.e., 2,3,3',4,4'-penta-O-acetyl-1',6,6'-tri-O-tritylsucrose] which was deprotected to deliver 3,4-di-O-acetyl--(D-fructofuranosyl)--D-glucopyranoside 2,3,4-triacetate (4-PAS). This intermediate was transformed into 3,4-di-O-acetyl--(D-fructofuranosyl)--D-glucopyranoside 2,3,6-triacetate (6-PAS). Chlorination of the above-mentioned intermediate using triphenylphosphine and thionyl chloride provided sucralose pentaacetate. The byproduct (triphenylphosphine oxide) was reclaimed. The synthesis of the target compd. (Sucralose) was achieved after deacetylation. This method is simple, byproducts are easily reclaimed and starting materials are inexpensive. |
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zou-yanhua
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2楼2011-08-22 12:03:58
