In a series of polymethoxy benzaldehydes and acetophenones it was found that diorthosubstitution distorts the Ar-OCH3 conformation. This distortion is accompanied by a downfield shift in the corresponding methoxyl 13C frequencies and an increase in their spin-lattice relaxation times.
✦ LIBER ✦
Conformation of ring A in triterpenoid ketones. Carbon-13 chemical shifts and spin-lattice relaxation times of lupane and 18α-oleanane derivatives
✍ Scribed by Buděšínský, Miloš; Klinot, Jiří
- Book ID
- 121216897
- Publisher
- UOCHB
- Year
- 1989
- Tongue
- English
- Weight
- 798 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0010-0765
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