Tetrahedron p. 4937 - 4948 (1992)
Update date:2022-07-30
Topics:
Sohar, Pal
Lazar, Laszlo
Fueloep, Ferenc
Bernath, Gabor
Kobor, Jenoe
Starting from diastereomerically pure 1-(β-hydroxyethyl)-1'-methyl- or 2'-methyl-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolines (3a,b and 5a,b), 4-unsubstituted, 4-p-nitrophenyl- and 4-oxo-1- or 2-methyl-9,10-dimethoxy-2H,4H-1,6,7,11b-tetrahydro-1,3-oxazino<4,3-a>isoquinoline diastereomers (a and b) 6-9, 12 and 13 were prepared.The relative configurations and the predominant conformations were determined by 1H and 13C NMR spectroscopy, use also being made of DR, DEPT, DNOE and 2D-HSC measurements.
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