Potassium Iodide → Methyl 12-Methyl-12H-dibenzo[d,g][1,3]dioxocin-6-carboxylate

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Reaction Steps

1,1-Bis(2-hydroxyphenyl)ethane was treated with dichloroacetic acid, potassium carbonate, and potassium iodide in isopropyl alcohol as in Example 3 and the product obtained was esterified with methanol as in Example 4 to obtain 1.71 g of the title compound as a mixture of cis and trans isomers. A portion of this was recrystallized from ether to obtain a pure sample of the cis isomer of the title compound as a white solid melting at 146°-147° C. The geometry was determined by proton NMR spectroscopy.

Provenance & Evidence