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fever366

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Zu 1  mmol der entsprechenden Verbindung 3a-d in 250
cm3 Chloroform werden bei 0¡ãC 1 mmo12a-d  und 202
mg  (2 mmol) Triethylamin getropft.  Es  wird  5  Stdn.
bei Raumtemp. nachgeruhrt. Der  ausgefallene Nieder-
schlag wird  abgesaugt  (4a,b)  oder das Losungsmittel
i.Vak. abdestilliert und der Ruckstand an Kieselgel mit
Chloroform/Aceton-Gemischen  chromatographiert.

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kn_yao

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°®ÓëÓêÏÂ(½ð±Ò+1): 2011-11-19 18:20:09
fever366(½ð±Ò+20, ·­ÒëEPI+1): 2011-11-21 09:43:14
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