Description
This form of the alkaloid is more widespread than the d-form, occurring in Corydalis caseana, C. micrantha, C. montana, C. scouleri, C. sibirica and Papaver somniferum. It has [α]26D - 318° (c 0.41, MeOH) or - 289° (c 0.62, MeOH). It forms pale grey needles when crystallized from MeOH. The hydrochloride has m.p. 268-9°C; the picrate, m.p. 206°C (dec.) and the diethyl ether, m.p. 155°C. The oxidation products are the same as for the preceding base.
References
Manske., Can. J. Res., 14B, 347, 354 (1936)
Manske., ibid, 17B, 57 (1939)
Manske., ibid, 18B, 414 (1940)
Manske., ibid, 20B, 49 (1942)
Brochmann-Hanssen, Nielsen., Tetrahedron Lett., 2261 (1966)
Synthesis:
Kametani., Japanese Patent, 70, 37,976, 10 December 1970
