Sulfuric Acid → HCID 22107235, compound

Participants

Reaction Steps

A mixture of 12.01 g (50 mmol) of the above 9-oxo-9H-xanthene-2-carboxylic acid, 77.4 g (420 mmol) of n-dodecanol and 0.2 g (2 mmol) of concentrated sulfuric acid is kept at 140° C. for 6 hours. The sulfuric acid is neutralized with 0.33 g (4 mmol) of sodium acetate and the excess n-dodecancl is removed by distillation (98° C./0.1 mbar). The brown residue is taken up in isopropanol and the product which has precipitated is filtered off and dried under a high vacuum. 16.7 g(82%) of n-dodecyl 9-oxo-9H-xanthene-2-carboxylate, melting point 79°-81° C., result s a beige powder.

Provenance & Evidence