Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Ravi Sankar Ampapathi"'
Autor:
Manoj Kumar Gangwar, Dipankar Koley, Ashfaq Ahmad, Raziullah, Ravi Sankar Ampapathi, Afsar Ali Khan, Himangsu Sekhar Dutta, Mohit Kumar, Jayanti Vaishnav
Publikováno v:
The Journal of Organic Chemistry. 86:16558-16572
A ytterbium triflate-catalyzed diastereoselective [3 + 2] cycloaddition of quinoxalinones with donor-acceptor cyclopropanes and cyclobutanes is described. A series of tetrahydropyrrolo-quinoxalinone derivatives were obtained in high yields (up to 96%
Autor:
Jhajan Lal, Gurudayal Prajapati, Rachana Meena, Ruchir Kant, Ravi Sankar Ampapathi, Damodara N. Reddy
Publikováno v:
Chemistry, an Asian journal. 18(1)
We report herein the first systematic crystal structural investigation of azaproline incorporated in homo- and heterochiral diprolyl peptides. The X-ray crystallography data of peptides 1-5 illustrates that stereodynamic nitrogen in azaproline adopte
Publikováno v:
Organicbiomolecular chemistry. 20(44)
The reductive coupling between allylic sulfonylhydrazones and aryl boronic acids gives 1,3-diarylpropene systems with good to excellent yields. Simple reaction conditions, high yields, and good functional group tolerance are the salient features of t
Autor:
Gajendra Pratap Singh, Dipak Datta, Uttam Ghosh, Sudip Pal, Tapas K. Kundu, Ravi Sankar Ampapathi, Moumita Basu, Sanjeev Meena, Tushar Kanti Chakraborty
Publikováno v:
ChemistrySelect. 6:7887-7893
Autor:
Ruchir Kant, Himangsu Sekhar Dutta, Mohit Kumar, Raziullah, Dipankar Koley, Afsar Ali Khan, Ravi Sankar Ampapathi, Ashfaq Ahmad, Jayanti Vaishnav
Publikováno v:
European Journal of Organic Chemistry. 2021:2107-2113
Publikováno v:
Organic Letters. 22:9258-9262
We herein report a chemo- and regioselective 6-exo-dig catalytic cyclization of Ugi adducts N-substituted 2-alkynamides to access functionalized morpholinone glycoconjugates in the presence of triphenylphosphine. This array allows an interesting mult
Autor:
Himangsu Sekhar, Dutta, Ashfaq, Ahmad, Afsar Ali, Khan, Mohit, Kumar, Raziullah, Jayanti, Vaishnav, Manoj, Gangwar, Ravi Sankar, Ampapathi, Dipankar, Koley
Publikováno v:
The Journal of organic chemistry. 86(23)
A ytterbium triflate-catalyzed diastereoselective [3 + 2] cycloaddition of quinoxalinones with donor-acceptor cyclopropanes and cyclobutanes is described. A series of tetrahydropyrrolo-quinoxalinone derivatives were obtained in high yields (up to 96%
Publikováno v:
Organic & Biomolecular Chemistry. 17:4460-4464
An expeditious method for the synthesis of homo and heterochiral dipeptides containing l-alanine and d/l 2-methyl allo-hydroxyl prolines was developed using direct aminolysis of bicyclic lactones derived from d/l alanine. The impact of C-2 methylatio
Autor:
Harikesh, Kumar, Gurudayal, Prajapati, Atul, Dubey, Ravi Sankar, Ampapathi, Pintu Kumar, Mandal
Publikováno v:
Organic letters. 22(23)
We herein report a chemo- and regioselective 6
Autor:
Gurudayal Prajapati, Anbarasu Kumar, Himangsu K. Bora, Rajdeep Guha, Ravi Sankar Ampapathi, Ahila Mathimaran
Publikováno v:
Biogerontology. 22(1)
It has been earlier reported that partially saturated canthaxanthin (PSC) from Aspergillus carbonarius mutant is non-toxic, has anti-lipid peroxidation activity and can induce apoptosis in prostate cancer cell lines. In the present study, the antiagi