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33644512653
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Compound 6a was simply isolated by filtration of the zeolite and removal of DMC under vacuum. No further purification was necessary (see Experimental Section).
-
-
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17
-
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33644499676
-
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note
-
The FCC purification of compound 12 was made difficult by the presence of some unidentified byproducts (10%) in the reaction mixture. For this reason, a moderate yield of 12 (67% compared to the higher GC amount of 88%) was obtained.
-
-
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18
-
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33644537284
-
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note
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Only compound 13b was further purified by FCC (see Experimental Section).
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+ and DMC, from 0.14 to 0.86.
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29
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33644552654
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note
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33644508245
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Based upon spectroscopic investigations, refs 9 and 11 detail the adsorption pattern of phenols and amines over NaY and NaX faujasites. Since no data are available for carboxylic acids. Scheme 12 is only a reasonable hypothesis. For clarity, the interactions of OH substituents of acids 3-5 with NaY (see Scheme 9) are omitted.
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