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Nuclear Overhauser effect screening

Recently, a number of NMR screening techniques based on the nuclear Overhauser effect (NOE) have been developed. [Pg.335]

Fattorusso and co-workers identified a component of wormwood called artar-borol. Correlation spectroscopy (COSY) and rotating frame nuclear overhauser effect spectroscopy (ROESY) experiments allowed for deduction of four possible diastereomeric structures of artarborol, 2-5. Low energy conformers of 11-14 were obtained through a molecular mechanics (MM) search. These conformers were screened to identify those having a dihedral angle of around 90 for the C-8 and C-9 protons due to a low coupling constant between these protons. Only conformers of 11 and 13 satisfied this criterion. Next, five low energy conformers, two... [Pg.73]

See other pages where Nuclear Overhauser effect screening is mentioned: [Pg.22]    [Pg.134]    [Pg.299]    [Pg.25]    [Pg.74]    [Pg.368]    [Pg.433]    [Pg.266]    [Pg.163]    [Pg.77]   
See also in sourсe #XX -- [ Pg.3454 ]



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