Isocorybulbine
Title: Isocorybulbine
CAS Registry Number: 22672-74-8
CAS Name: (13S-trans)-5,8,13,13a-Tetrahydro-3,9,10-trimethoxy-13-methyl-6H-dibenzo[a,g]quinolizin-2-ol
Additional Names: 3,9,10-trimethoxy-13a-methyl-13ab-berbin-2-ol; 2-hydroxy-13-methyl-3,9,10-trimethoxyberbine
Molecular Formula: C21H25NO4
Molecular Weight: 355.43
Percent Composition: C 70.96%, H 7.09%, N 3.94%, O 18.01%
Literature References: From tubers of Corydalis cava (L.) Schweigg. & Korte (C. tuberosa DC., Fumariaceae): Gadamer, Arch. Pharm. 240, 19 (1902). Structure: Späth, Dobrowsky, Ber. 58, 1274 (1925). Synthesis: Späth, Holter, ibid. 59, 2800 (1926). Abs configuration: P. W. Jeffs, Experientia 21, 690 (1965); K. Iwasa et al., J. Org. Chem. 46, 4744 (1981).
Properties: Leaflets, mp 179-180°; also given as 187-188°. [a]D15 +301° in chloroform. Sol in alcohol, dil acids.
Melting point: mp 179-180°; also given as 187-188°
Optical Rotation: [a]D15 +301° in chloroform
 
Derivative Type: Methiodide
Molecular Formula: C21H25NO4.CH3I
Molecular Weight: 497.37
Percent Composition: C 53.13%, H 5.67%, N 2.82%, O 12.87%, I 25.52%
Properties: Crystals, mp 218-221°.
Melting point: mp 218-221°

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