Phthalide

Description

White powder; sweet tonka, coumarin, powdery, coconut, phenolic, lactonic aroma.

The Uses of Phthalide

Phthalide may be used in scaffolds for the design of high potency monoamine oxidase (MAO) inhibitors.

Definition

ChEBI: A gamma-lactone that is 1,3-dihydro-2-benzofuran in which the hydrogens at position 1 are replaced by an oxo group.

Aroma threshold values

Low strength odor, Tonka type.

Taste threshold values

Sweet coumarin, coconut, creamy, anisic, green vegetable, floral taste at 100 ppm in water.

Synthesis Reference(s)

Chemistry Letters, 23, p. 1149, 1994
The Journal of Organic Chemistry, 68, p. 9423, 2003 DOI: 10.1021/jo0350763
Tetrahedron Letters, 7, p. 6097, 1966

Flammability and Explosibility

Not classified

Pharmacology

Systemic fungicide giving effective preventive control of the rice blast fungus in rice as foliar spray.

Purification Methods

Crystallise phthalide from water (75mL/g) and dry it in air on filter paper. [Beilstein 17/10 V 7.]

Toxicity evaluation

Mammalian toxicology. Oral: Acute oral LD₅₀ for rats and mice >10000 mg/kg. Skin and eye: Acute percutaneous LD₅₀ for rats and mice >10000 mg/kg. Not a shaved skin irritant, eye irritant (rabbits). Inhalation LC50 (4 h) for rats >4.1 mg/L air. NOEL: (2 yr) for rats 2000, mice 100 mg/kg diet.