Molecular mechanics (MM2) calculations were carried out on conformers of 6-eudesmanolide derivatives.Including I (R=H,R1=OH; R=OH, R1=H) and II (R2=Me,R3=H; R2=H, R3=Me) According to the numerical results obtained, the conformational behaviour of the compounds studied can be predicted and the geometry tendencies of the different products studied. Thus the coupling constants were calculated theoretically, giving results consistent with the experimental data.
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