5-Isoquinolinol,1-[[4,5-dimethoxy-2-[[(6aS)-5,6,6a,7-tetrahydro-1,2,3,10-tetramethoxy-6-methyl-4H-dibenzo[de,g]quinolin-9-yl]oxy]phenyl]methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-,(1S)-

Description

Column chromatography of the alkaloidal extract from the roots of Thalictrum minus var. elatum Koch provides this highly-substituted alkaloid (cL thalmelati dine). Purification by recrystallization from Et20-heptane gives colourless crystals with the above melting point. When EtOH is used as the crystallizing solvent, the product has a higher m.p. of 1 08-1 10°C. The alkaloid has [α]²⁴_D + 22° (c 0.9, MeOH) and gives an ultraviolet spectrum in EtOH consisting of a single absorption maximum at 283 ffi/.1.

References

Reisch et aZ., Tetrahedron Lett., 2113(1970)