NMR study of 6-azabicyclo[3.2.1 ]octene derivatives, by-products of catharanthine synthesis
作者:Eszter Gács-Baitz、Hedvig Bölcskei、Csaba Szántay
DOI:10.1039/p29940000213
日期:——
The structures and stereochemistries of several 6-azabicyclo[3.2.1] octene derivatives, obtained by rearrangement reactions of the catharanthine synthesis, were determined by various NMR methods. Long-range C-13-H-1 coupling constants were measured by selective two-dimensional INEPT experiments. The dependence of (3)J(C,H) and (2)J(C,H) coupling constants on the dihedral angles and on the position of an electronegative substituent along the coupling path was studied.