Opianic Acid
Title: Opianic Acid
CAS Registry Number: 519-05-1
CAS Name: 6-Formyl-2,3-dimethoxybenzoic acid
Additional Names: 5,6-dimethoxyphthalaldehydic acid
Molecular Formula: C10H10O5
Molecular Weight: 210.18
Percent Composition: C 57.14%, H 4.80%, O 38.06%
Literature References: Obtained (together with cotarnine) by heating narcotine with dil HNO3. Prepn: Wilson et al., J. Org. Chem. 16, 792 (1951); Blair, J. Chem. Soc. 1955, 708. NMR studies: Buu-Hoi et al., Bull. Soc. Chim. Fr. 1970, 137.
Properties: Needles from water, mp 150°. Sol in 400 parts cold, 60 parts boiling water; sol in alcohol, ether. uv max: 215, 284 nm (e 20,700, 6500).
Melting point: mp 150°
Absorption maximum: uv max: 215, 284 nm (e 20,700, 6500)

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