1H and 13C NMR characteristics of synthetic derivatives of steroid sapogenins. Part III. 16Beta,23:23,26-diepoxy side chains.
The full assignments of the (1)H and (13)C NMR signals of steroids bearing the 16beta,23:23,26-diepoxy side chain are provided. Differentiation of the diasterotopic H-26 pair was achieved with the aid of NOESY experiments. The main substituent and steric effects associated with this moiety and their influence on the chemical shifts of the neighboring atoms are discussed.
Vázquez-Ramírez
Ignacio
I
Departamento de Química Orgánica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico.
Macías-Alonso
Mariana
M
Arcos-Ramos
Rafael O
RO
Ruíz-Pérez
Karen M
KM
Solano-Ramírez
Diana O
DO
Iglesias Arteaga
Martín A
MA
D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008958:Models, Molecular; D011522:Protons; D012502:Sapogenins / Q000737:chemistry*
D002247:Carbon Isotopes; D011522:Protons; D012502:Sapogenins