Protocatechuic Acid → HCID 131730573, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 3,4-dihydroxybenzoic acid (30.8 g, 200 mmol) and toluene (220 ml) was dehydrated by distilling 20 mL of the solution. Thereafter, 28.4 g (100 mmol) of titanium(IV) isopropoxide (TTIP) was added to the solution while stirring. The mixed solution was refluxed for 1 hour, and then, while the distillation temperature was 100° C. or higher, distilled until the amount of the solution became half. After the distillation, solid content of the product was isolated by suction filtering using a membrane suction filter. The residual solid content was heated to 100° C. under vacuum using a vacuum dryer so that remaining volatile components were completely removed. The solid content (3,4-dihydroxybenzoic acid-titanium complex) was brown in color. The yield amount was 35.0 g (99.4 mmol), and the yield percentage was 99%. 3.52 g of 3,4-dihydroxybenzoic acid-titanium complex was dissolved into 100 mL of 1:4 acetylacetone/ethyl acetate to produce a coating liquid.

Provenance & Evidence