Homology by Saunders Maclane

By Saunders Maclane

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In the acylation of anisole by acetic anhydride, bismuth trichloride appears as a better catalyst than iron and zinc chlorides (Table 4, entries 2,5,6). 20 Table 3. Acylation of anisole by acyl chlorides RCOC1 in the presence of a solvent a Entry Catalyst (% tool) R Solvent Conditions Conversion ( ~o)b 1 BiC13 (5) Me 28 2 3 4 5 BiC13 (10) Bi203 (5) BiC13 (10) Bi203 (5) Me Me Me Me2CH 6 BiC13 (10) Me2CH CH2C12, Et20 (10/1) reflux, 3h MeNO2, 80~ 2h CH2C12, Et20 (10/1) reflux 4h C6H6, reflux 4h 7 Bi203 (5) Me2CH C6H 6, 8 BiC13 (10) Me2CH MeNO2, reflux 3,5h a.

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