Zobrazeno 1 - 10 of 105 pro vyhledávání: '"Ashish Kapur"'
1
Nanotechnology for Sustainable Raw Mineral Extraction and Use
Autor: Kritin Chugh, Ashish Kapur, Kavita S. Jerath
Publikováno v: SpringerBriefs in Environmental Science ISBN: 9783319713267
In 2000, the nanotechnology research agenda was primarily focused on the discovery, characterization, and modeling of nanoscale material and phenomenon. As nanotechnology continues to advance, the agenda is increasingly focused on addressing key ques
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1885c11ad935678aecc8776865cf5e4e
https://doi.org/10.1007/978-3-319-71327-4_4
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2
Thermal reactions involving 1-azadienes and allenic esters-(II):1a reactions of 3-(N-aryliminomethyl)chromones with allenic esters-tandem reorganization of [2+2] cycloadducts to novel compounds
Autor: Poonam Parashar, Priyanka Kanwal, Amandeep Kaur, Mohan Paul S. Ishar, Vivek K. Gupta, Ashish Kapur, Vishal Sharma
Publikováno v: Tetrahedron Letters. 56:4784-4787
Thermal reactions of 3-(N-aryliminomethyl)chromones (4a–d) with ethyl 2,3-butadienoate (5a) and ethyl 4-phenyl-2,3-butadienoate (5b), on refluxing in dry benzene, afford novel compounds 6a–e, apparently, derived from tandem reorganization of init
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d46e690341174e3bad8ebaf66709bd9
https://doi.org/10.1016/j.tetlet.2015.06.058
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3
Cytotoxic activity of 3-(5-phenyl-3 H -[1,2,4]dithiazol-3-yl)chromen-4-ones and 4-oxo-4 H -chromene-3-carbothioic acid N -phenylamides
Autor: Ajit Kumar Saxena, Mohan Paul S. Ishar, Ashish Kapur, Tilak Raj, Richa Kaur Bhatia, Madhunika Sharma
Publikováno v: European Journal of Medicinal Chemistry. 45:790-794
6/6,7-Substituted-3-formylchromones (8a-g) were reacted with 2 equivalents thiobenzamide (9) in refluxing toluene to furnish substituted-3-(5-phenyl-3H-[1,2,4]dithiazol-3-yl)chromen-4-ones (10a-g) in high yields. Similarly, when substituted-2-anilino
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95993b728b86a3d34817980ffeaee7c
https://doi.org/10.1016/j.ejmech.2009.11.001
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4
Domino routes to substituted benzoindolizines: tandem reorganization of 1,3-dipolar cycloadducts of nitrones with allenic esters/ketones and alternative cycloaddition–palladium catalyzed cyclization pathway
Autor: Mohan Paul S. Ishar, Parminder Singh, Lakhwinder Singh, Priyanka Kanwal, Ashish Kapur, Venkatesan Subramanian, Kamal Kumar, M. Elango, Vivek K. Gupta
Publikováno v: Tetrahedron. 65:4593-4603
Reactions of C -(4-oxo-4 H [1]benzopyran-3-yl)- N -phenyl nitrones ( 7 ) with allenic esters ( 8a – c ) and allenic ketones ( 18a – d ) furnish benzoindolizines ( 9a – k , 19a – d ) in good yields. The formation of benzoindolizines is postula
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ae726c1800a39cb641cdea100bc3d23
https://doi.org/10.1016/j.tet.2009.03.076
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6
Regio- and π-Facial Selective Cycloadditions Involving 2-Phenyl-4-dimethylamino-1-thia-3-azabuta-1,3-diene and Allenic Esters: An Efficient Route to Novel 6-Alkylidene-6H-2-phenyl-5-ethoxycarbonyl-1,3-thiazines
Autor: Ashish Kapur, Tilak Raj, Mohan Paul S. Ishar, Amritpal Kaur, Navdeep K. Girdhar
Publikováno v: Synthesis. 2004:775-778
2-Phenyl-4-dimethylamino-1-thia-3-azabuta-1,3-diene (4) undergoes regio- and stereoselective [4+2] cycloadditions with allenic esters on refluxing in CH 2 Cl 2 -beuzeue and the initially formed cycloadducts 6 furnish, afterelimination of dimethylamin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d0798024267bd17fe1bfcf8e19a8927d
https://doi.org/10.1055/s-2004-815995
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7
ChemInform Abstract: Cytotoxic Activity of 3-(5-Phenyl-3H-[1,2,4]dithiazol-3-yl)chromen-4-ones and 4-Oxo-4H-chromene-3-carbothioic Acid N-Phenylamides
Autor: Ajit Kumar Saxena, Ashish Kapur, Madhunika Sharma, Tilak Raj, Richa Kaur Bhatia, Mohan Paul S. Ishar
Publikováno v: ChemInform. 41
6/6,7-Substituted-3-formylchromones (8a-g) were reacted with 2 equivalents thiobenzamide (9) in refluxing toluene to furnish substituted-3-(5-phenyl-3H-[1,2,4]dithiazol-3-yl)chromen-4-ones (10a-g) in high yields. Similarly, when substituted-2-anilino
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::95eba26af26d32c64f7b3008643cf2d9
https://doi.org/10.1002/chin.201023190
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8
Annulation Reactions of Allene-Derived 1,3-Dipole with 3-Substituted-Chromones: Unusual Recognition of 4π-Component in 3-(N-Aryliminomethyl)chromones through [4 + 3] Annulation
Autor: Rajiv Kapoor, Kamal Kumar, Mohan Paul S. Ishar, and Ashish Kapur
Publikováno v: Organic Letters. 2:2023-2025
All-carbon dipole derived by the interaction of triphenylphosphine with allenic ester is able to locate the polarized 2π-component in 3-formylchromones through a regioselective [2 + 3] addition to the C2−C3 π-bond, which is followed by deformylat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba4d090d3d45da2022dd2fb7baa417fc
https://doi.org/10.1021/ol0000713
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9
Unusual [8 + 2] Annelation in the Reactions of Allenic Ester/Ketone-Derived 1,3-Dipoles with Tropone
Autor: Kamal Kumar, and Ashish Kapur, Mohan Paul S. Ishar
Publikováno v: Organic Letters. 2:787-789
All-carbon 1,3-dipoles derived from allenic esters/ketones, by catalytic interaction with triphenylphosphine, undergo an unusual [8 + 2] annelation with tropone, leading to 8-oxa-9-(ethoxycarbonyl/acylalkylidene)bicyclo[5.3.0]deca-1,3,5-trienes. Dipo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ee2a0253e858ec826b5c46a2bac7486
https://doi.org/10.1021/ol000007l
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