4-Chlororesorcinol → 2',4,5,6,7-pentachloro-3',6'-dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one

Participants

Reaction Steps

Treatment of tetrachlorophthalic anhydride (5 g, 17.48 mmol), 4-chlororesorcinol (2.78 g, 19.23 mmol) and resorcinol (2.12 g, 19.23 mmol) according to the procedure described in Example 1 Step 1 provided 7.24 g of 18.6% pure 2′,4,5,6,7-pentachloro-3′,6′-dihydroxy-3H-spiro[isobenzofuran-1,9′-xanthen]-3-one that was collected and taken to the next step as a mixture.

Provenance & Evidence