Protopine
Title: Protopine
CAS Registry Number: 130-86-9
CAS Name: 4,6,7,14-Tetrahydro-5-methyl-bis[1,3]benzodioxolo[4,5-c:5¢,6¢-g]azecin-13(5H)-one
Additional Names: 7-methyl-2,3:9,10-bis(methylenedioxy)-7,13a-secoberbin-13a-one; fumarine; macleyine
Molecular Formula: C20H19NO5
Molecular Weight: 353.37
Percent Composition: C 67.98%, H 5.42%, N 3.96%, O 22.64%
Literature References: From opium: Hesse, Ber. 4, 693 (1871); also from the herb Fumaria officinalis L., Chelidonium majus L., and many other Papaveraceae and Fumariaceae: Manske in The Alkaloids vol. IV, R. H. F. Manske, H. L. Holmes, Eds. (Academic Press, New York, 1954) pp 157-159. Structure: Perkin, Jr., J. Chem. Soc. 109, 815 (1916); Gadamer, Bruchhausen, Arch. Pharm. 260, 97 (1922); Mottus et al., Can. J. Chem. 31, 1144 (1953); Anet, Marion, ibid. 32, 452 (1954). Synthesis: Haworth, Perkin, J. Chem. Soc. 1926, 1769. Crystal structure: Hall, Ahmed, Acta Crystallogr. 24B, 337 (1968).
Properties: Monoclinic prisms from alcohol + chloroform, mp 208°. d 1.399 (calc). uv max (95% ethanol): 293 nm (log e 3.93). Sol in 15 parts chloroform, 900 parts alc, 1000 parts ether. Slightly sol in ethyl acetate, carbon disulfide, benzene, petr ether. Practically insol in water.
Melting point: mp 208°
Absorption maximum: uv max (95% ethanol): 293 nm (log e 3.93)
Density: d 1.399 (calc)
 
Derivative Type: Hydrochloride
Molecular Formula: C20H19NO5.HCl
Molecular Weight: 389.83
Percent Composition: C 61.62%, H 5.17%, N 3.59%, O 20.52%, Cl 9.09%
Properties: Prisms from alcohol, sol in 143 parts water at 13°, sol in alcohol. Also a hexahydrate, needles from water.
 
Derivative Type: Methiodide
Molecular Formula: C20H19NO5.CH3I
Molecular Weight: 495.31
Percent Composition: C 50.92%, H 4.48%, N 2.83%, O 16.15%, I 25.62%
Properties: Twinned crystals from methanol, dec 217°.

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