Results 21 to 30 of about 14,574 (240)

Raistrickiones A−E from a Highly Productive Strain of Penicillium raistrickii Generated through Thermo Change

Marine Drugs, 2018
Three new diastereomers of polyketides (PKs), raistrickiones A−C (1–3), together with two new analogues, raistrickiones D and E (4 and 5), were isolated from a highly productive strain of Penicillium raistrickii, which was subjected to an ...
De-Sheng Liu, Xian-Guo Rong, Hui-Hui Kang, Li-Ying Ma, Mark T. Hamann, Wei-Zhong Liu   +5 more
doaj   +1 more source

Field-Induced Diastereomers for Chiral Separation [PDF]

Physical Review Letters, 2019
Published by APS, College Park, Md.
Andrey Yachmenev, Jolijn Onvlee, Emil Zak, Alec Owens, Jochen Küpper   +4 more
openaire   +6 more sources

Preparative thin-layer and column chromatography of prostaglandins

Journal of Lipid Research, 1969
Analytical and preparative chromatographic methods for monounsaturated prostaglandins are described. The systems were developed specifically for separation of the various hydroxy epimers of prostaglandin E1 and F1 but also offer superior separations for ...
Niels H. Andersen
doaj   +1 more source

Asymmetric synthesis of α-alkylated carbonyl compounds and their biological application [PDF]

Delta Journal of Science, 2002
Creation of asymmetric centers is the fundamental basis of asymmetric synthesis as the resulting diastereomers or enantiomers are formed in unequal ratio.
Hamada Mandour, Adel Selim, Mariam Ezzat, Ahmed Noser   +3 more
doaj   +1 more source

Separation and Bioactive Assay of 25R/S-Spirostanol Saponin Diastereomers from Yucca schidigera Roezl (Mojave) Stems

Molecules, 2018
In order to find a simple, generic, efficient separation method for 25R/S-spirostanol saponin diastereomers, the liquid chromatographic retention behaviors of C12 carbonylation and C12 unsubstituted 25R/S-spirostanol saponin diastereomers on different ...
Lu Qu, Jingya Ruan, Song Wu, Peijian Huang, Jiejing Yan, Haiyang Yu, Yi Zhang, Tao Wang   +7 more
doaj   +1 more source

Bioinspired-Metalloporphyrin Magnetic Nanocomposite as a Reusable Catalyst for Synthesis of Diastereomeric (−)-Isopulegol Epoxide: Anticancer Activity Against Human Osteosarcoma Cells (MG-63)

Molecules, 2018
In the present study, we developed a green epoxidation approach for the synthesis of the diastereomers of (−)-isopulegol benzyl ether epoxide using molecular oxygen as the oxidant and a hybrid manganese(III)-porphyrin magnetic reusable ...
Lucas D. Dias, Ana L. M. Batista de Carvalho, Sara M. A. Pinto, Gilberto L. B. Aquino, Mário J. F. Calvete, Liane M. Rossi, M. P. M. Marques, Mariette M. Pereira   +7 more
doaj   +1 more source

HPLC Separation of Diastereomers: Chiral Molecular Tools Useful for the Preparation of Enantiopure Compounds and Simultaneous Determination of Their Absolute Configurations

Molecules, 2016
To obtain enantiopure compounds, the so-called chiral high performance liquid chromatography (HPLC) method, i.e., HPLC using a chiral stationary phase, is very useful, as reviewed in the present Special Issue.
Nobuyuki Harada
doaj   +1 more source

Preparation and Use of a General Solid-Phase Intermediate to Biomimetic Scaffolds and Peptide Condensations

Molecules, 2018
The Distributed Drug Discovery (D3) program develops simple, powerful, and reproducible procedures to enable the distributed synthesis of large numbers of potential drugs for neglected diseases.
J. Geno Samaritoni, Jacek G. Martynow, Martin J. O’Donnell, William L. Scott   +3 more
doaj   +1 more source

Systematic synthetic study of four diastereomerically distinct limonene-1,2-diols and their corresponding cyclic carbonates

Beilstein Journal of Organic Chemistry, 2019
In order to produce versatile and potentially functional terpene-based compounds, a (R)-limonene-derived diol and its corresponding five-membered cyclic carbonate were prepared.
Hiroshi Morikawa, Jun-ichi Yamaguchi, Shun-ichi Sugimura, Masato Minamoto, Yuuta Gorou, Hisatoyo Morinaga, Suguru Motokucho   +6 more
doaj   +1 more source

Modular and Stereoselective Synthesis of Cyclobutane β‐Amino Alcohols

Angewandte Chemie, EarlyView.
Late‐stage functionalization and photoisomerization of 1,2‐azaborine leads to a general strategy for the synthesis of diversely substituted cyclobutane β‐amino alcohols. The relative stereochemistry of the resulting products is unambiguously defined by the stereospecific and stereoselective nature of the photoisomerization‐hydrogenation‐oxidation ...
Xinyu Yang, Tomoya Ozaki, Bo Li, Shih‐Yuan Liu   +3 more
wiley   +2 more sources