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13C NMR spectroscopy of neolignans

1976; Elsevier BV; Volume: 15; Issue: 10 Linguagem: Inglês

10.1016/s0031-9422(00)88934-7

1873-3700

Ernest Wenkert, Hugo E. Gottlieb, Otto R. Gottlieb, Marilia O. da S. Pereira, Mariza D. Formiga,

Natural product bioactivities and synthesis

The 13C NMR spectra of 15 neolignans of several structural types and two lignans were analyzed and their carbon shifts assigned. The shifts of pyrogallol ether and ethyl phenyl carbinyl ether models were used in this connection. The stereochemistry of a dimeric sideproduct in the preparation of the latter models was determined by 13C NMR analysis.