Výsledky vyhledávání - "Ibrahim Ibnusaud"

Natural Product-Derived Chiral Pyrrolidine-2,5-diones, Their Molecular Structures and Conversion to Pharmacologically Important Skeletons

Autor: Rani R. Nair, Zabeera Kallingathodi, Ibrahim Ibnusaud, Simimole Haleema, Chithra Mohan, Sarath Muraleedharan Pillai, Rinshad V. Abdul, Chithra Gopinath, Deenamma Habel, Grace Thomas, Matthew Fritz, Andrew R. Puente, Jordan L. Johnson, Divya S. Nair, Prasad L. Polavarapu

Publikováno v: Journal of Natural Products. 83:2178-2190

The versatility of the natural products (2S,3S)- and (2S,3R)-3-hydroxy-5-oxotetrahydrofuran-2,3-dicarboxylic acids (1 and 2), isolated in large amounts from tropical plant sources, has been demonstrated by the construction of 3-substituted and 3,4-di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63d758e186fa17c444ff823f228fc069
https://doi.org/10.1021/acs.jnatprod.0c00211

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Fragmentation method reveals a wide spectrum of intramolecular hydrogen bond energies in antioxidant natural products

Autor: Milind M. Deshmukh, Ibrahim Ibnusaud, Vijay Singh, Shridhar R. Gadre

Publikováno v: New Journal of Chemistry. 44:5841-5849

Intramolecular hydrogen bonds (IHBs) have been reported to have a pronounced effect on the biological activity of naturally occurring compounds. Despite this, the direct estimation of IHB energies in natural products has not been attempted. In this w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17396906cc933dc2ab650f4780de6a54
https://doi.org/10.1039/d0nj00304b

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Dissymmetry Factor Spectral Analysis Can Provide Useful Diastereomer Discrimination: Chiral Molecular Structure of an Analogue of (−)-Crispine A

Autor: Prasad L. Polavarapu, Ibrahim Ibnusaud, Divya S. Nair, Zabeera Kallingathodi, Sarath Muraleedharan Pillai, Didimos Johnson, Jordan L. Johnson

Publikováno v: ACS Omega
ACS Omega, Vol 4, Iss 4, Pp 6154-6164 (2019)

(1R,10bR)-1'-((R)-1,2-Dihydroxyethyl)-1-hydroxy-8,9-dimethoxy1,5,6,10b-tetrahydropyrrolo [2,1-a]isoquinolin-3(2H)-one, an analogue of (-)-crispine A, with three stereogenic centers is synthesized and its absolute configuration (AC) established using

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de10b4fe63d0b5a084d4688e0b451a49
http://europepmc.org/articles/PMC6648312

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How important are the intermolecular hydrogen bonding interactions in methanol solvent for interpreting the chiroptical properties?

Autor: Simimole Haleema, Annu Anna Thomas, Nathan D. Schley, Ibrahim Ibnusaud, Cody L. Covington, Andrew R. Puente, Prasad L. Polavarapu, Zabeera Kallingathodi, Ernesto Santoro, Prasanth C. Prakasan, Jordan L. Johnson

Publikováno v: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 247

Two crispine A analogs and tetrahydrofuro[2,3-b]furan-3,3a(6aH)-diol, endowed with hydroxyl groups that can participate in intramolecular hydrogen bonding, have been synthesized and experimental vibrational circular dichroism (VCD) spectra and optica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9f82a6305ffef301e83cd70ad1c4baf
https://pubmed.ncbi.nlm.nih.gov/33142265

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Stabilization of NaBH4 in Methanol Using a Catalytic Amount of NaOMe. Reduction of Esters and Lactones at Room Temperature without Solvent-Induced Loss of Hydride

Autor: Ebbin Joseph, Jevgenij A. Raskatov, Ibrahim Ibnusaud, Bakthan Singaram, Abhijith A, Prasanth C P, Nair D S

Publikováno v: The Journal of Organic Chemistry. 83:1431-1440

Rapid reaction of NaBH4 with MeOH precludes its use as a solvent for large-scale ester reductions. We have now learned that a catalytic amount of NaOMe (5 mol %) stabilizes NaBH4 solutions in methanol at 25 °C and permits the use of these solutions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9da94d74adfcda72feba14ee4040757
https://doi.org/10.1021/acs.joc.7b02993

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Capillary zone electrophorsis for the analysis of naturally occurring 2-hydroxycitric acids and their lactones

Autor: Simimole Haleema, Hassan Y. Aboul-Enein, David Joseph, Ibrahim Ibnusaud, Moolya Mohan, B. L. Abhijith

Publikováno v: Journal of Separation Science. 40:3351-3357

A simple capillary zone electrophoresis method with direct ultraviolet detection has been developed for the analysis of naturally occurring diastereomeric 2-hydroxycitric acid lactones. Using 50 mM sodium phosphate buffer of pH 7, a baseline resoluti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::774741f0bf11cd125f4c5d1b9d74dc58
https://doi.org/10.1002/jssc.201700192

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