Zobrazeno 1 - 10 of 53 pro vyhledávání: '"Ibrahim Ibnusaud"'
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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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5
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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7
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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8
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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9
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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