16742-51-1Relevant articles and documents
Two new sphingolipids from the stem bark of Synsepalum msolo (Sapotaceae)
Ndifor, Ache Roland,Stanislaus, Njinga Ngaitad,Fru, Chi Godloves,Talontsi, Ferdinand,Tabopda, Turibio Kuiate,Menkem, Elisabeth Zeuko'o,Tchaleu, Ngadjui Bonaventure,Owusu, Yeboah Samuel
, (2021)
Synsepalum msolo commonly known as Bang Bali in Bali-Nguemba, Cameroon is used in traditional medicine against various diseases. The leaves and stem bark extracts were subjected to silica gel and Sephadex LH20 column chromatography to yield pur
Pinelloside, an antimicrobial cerebroside from Pinellia ternata
Chen,Cui,Liu,Tan
, p. 903 - 906 (2003)
An antimicrobial cerebroside, pinelloside, was isolated from the dried tubers of Pinellia ternata (Thunb.) Breit. Its structure was determined as 1-O-β-D-glucopyranosyl-(2S,3R,4E, 11E) 2-(2′ R-hydroxyhexadecenoylamino)-4,11-octadecadiene-l,3 1,3-diol by chemical transformation and extensive spectroscopic analyses (IR, MS, 1H and 13C NMR, DEPT as well as 2D NMR techniques HMBC, HMQC, 1H-1H COSY and NOESY). The antimicrobial assay showed that this compound was inhibitory to the growth of Bacillus subtilis, Staphylococcus aureus, Aspergillus niger and Candida albicans, with minimum inhibitory concentrations (MICs) of 20, 50, 30 and 10 μg/ml, respectively. The MICs of penicillin G against bacteria B. subtilis, S. aureus, E. coli, P. fluorescens and H. pylori were 0.80, 0.34, 0.56, 1.34 and 0.92, and those of ketoconazole against fungi A. niger, C. albicans and T. rubrum 0.90, 0.65 and 1.0 μg/ml, respectively.
Self gelating isoracemosol A, new racemosaceramide A, and racemosol E from Barringtonia racemosa
Ponnapalli, Mangala Gowri,Dangeti, Nalini,Sura, Madhu Babu,Kothapalli, Haribabu,Akella, V. S. Sarma,Shaik, Jeelani Basha
supporting information, p. 63 - 69 (2016/11/29)
Phytochemical investigation into the CHCl3extract of the fruits of Barringtonia racemosa resulted in the isolation of two new metabolites along with isoracemosol A and betulinic acid as known metabolites. The new compounds were characterised as phytosphingosine-type ceramide [(2S,3S,4R)-2-[(2R)-2-hydroxyhexadecanoyl amino]-hexacos-8(E)-ene-1,3,4-triol, 1] and racemosol E [21β-acetoxy-22α-(2-methylbutyroxy)-olean-12-ene-3β,16α,28-triol, 2] on the basis of extensive spectroscopic data analysis and chemical modifications. In addition, the self-gelating property of isoracemosol A (3) was investigated for the first time, which leads to the unexpected agglomerated porous-like morphology.
Chiral Surfactant-Type Catalyst: Enantioselective Reduction of Long-Chain Aliphatic Ketoesters in Water
Lin, Zechao,Li, Jiahong,Huang, Qingfei,Huang, Qiuya,Wang, Qiwei,Tang, Lei,Gong, Deying,Yang, Jun,Zhu, Jin,Deng, Jingen
, p. 4419 - 4429 (2015/05/13)
A series of amphiphilic ligands were designed and synthesized. The rhodium complexes with the ligands were applied to the asymmetric transfer hydrogenation of broad range of long-chained aliphatic ketoesters in neat water. Quantitative conversion and excellent enantioselectivity (up to 99% ee) was observed for α-, β-, γ-, δ- and ε-ketoesters as well as for α- and β-acyloxyketone using chiral surfactant-type catalyst 2. The CH/π interaction and the strong hydrophobic interaction of long aliphatic chains between the catalyst and the substrate in the metallomicelle core played a key role in the catalytic transition state. Synergistic effects between the metal-catalyzed site and the hydrophobic microenvironment of the core in the micelle contributed to high stereoselectivity. (Chemical Equation Presented).
