Glycyrrhetic acid derivatives with modified ring A
β Scribed by M. H. A. Elgamal; B. A. H. El-Tawil; M. B. E. Fayez
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 164 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0022-3549
No coin nor oath required. For personal study only.
β¦ Synopsis
Ring A in glycyrrhetic acid (a therapeutically useful triterpenoid) was modified by contraction to an A-norhydroxy-acid derivative and by cleavage to a seco-A-2,3-dicarboxylic acid variant. Keyphrases 0 Glycyrrhetic acid derivatives-modification of ring A 0 Triterpenoid aglycones-modification of ring A in glycyrrhetic acid
π SIMILAR VOLUMES
## Abstract Baicalein, an important active constituent of the traditional Chinese herb __Scutellaria baicalensis__, exhibited antitumor activity and inhibitory activity against Pβgp 170. The syntheses of 25 baicalein derivatives, **2**β**26** (__Table__), are described here (__Schemeβ 1__). These co
## Abstract A series of derivatives of glycyrrhetinic acid (Ia) with altered lipophilicity in ring A are prepared and their apoptotic activities are discussed.
## Abstract The ^13^C NMR data of six pairs of 18Ξ±/18Ξ²βglycyrrhetic acid derivatives are presented. It is shown that the configuration at Cβ18 can easily be recognized by inspecting the chemical shifts of several characteristic carbons, e.g. Cβ12, Cβ13, Cβ18 and Cβ28. The shifts of these carbons or
## Abstract C~60~ carboxylic acid derivatives can be readily adsorbed on the surface of nanocrystalline TiO~2~ film. The C~60~ carboxylic acids adsorbed on nanocrystalline TiO~2~ films act as chargeβtransfer sensitizer. The electron transport from TiO~2~ to the C~60~ derivatives results in the gene