Výsledky vyhledávání - "Priyanka Kanwal"

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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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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Synthesis of Unsymmetrical Substituted 1,4-Dihydropyridines through Thermal and Microwave Assisted [4+2] Cycloadditions of 1-Azadienes and Allenic Esters

Autor: M P Singh Ishar, Venkatesan Subramanian, Vivek K. Gupta, M. Elango, Lakhwinder Singh, Priyanka Kanwal

Publikováno v: The Journal of Organic Chemistry. 73:2224-2233

Thermal and microwave assisted [4+2] cycloadditions of 1,4-diaryl-1-aza-1,3-butadienes with allenic esters lead to cycloadducts, which after a 1,3-H shift afford variedly substituted unsymmetrical 2-alkyl-1,4-diaryl-3-ethoxycarbonyl-1,4-dihydropyridi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fc1070c674d2414d9392a760a44b371
https://doi.org/10.1021/jo702548b

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Unusual conversion of substituted-3-formylchromones to 3-(5-phenyl-3H-[1,2,4]dithiazol-3-yl)chromen-4-ones: a facile and efficient route to novel 1,2,4-dithiazoles

Autor: Vivek K. Gupta, Mohan Paul S. Ishar, Priyanka Kanwal, Gurpinder Singh, Ajay Pal Singh Pannu, Tilak Raj

Publikováno v: Tetrahedron Letters. 49:243-246

Substituted 3-formylchromones react with 2-phenyl-4-dimethylamino-1-thia-3-azabuta-1,3-diene ( 4 ) or thio-benzamide ( 7 ) by heating their toluene solution in a sealed tube to give novel substituted 3-(5-phenyl-3 H -[1,2,4]dithiazol-3-yl)chromen-4-o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::927ed46f5af4c0869e5bfc13c9bac2f6
https://doi.org/10.1016/j.tetlet.2007.11.081

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Synthesis and X-ray structure analysis of benzoic acid [1-(6-methyl-2,4-dioxo-3,4-dihydro-2H-pyran-3-yl)eth-(E)-ylidene]-hydrazide with a water molecule (C15H14N2O4⋅H2O)

Autor: Savita Dhongde Desai, Dinesh, B. S. Shinde, Rajnikant, Kamni, Priyanka Kanwal, Madhukar B. Deshmukh

Publikováno v: Journal of Chemical Crystallography. 35:357-360

The crystal structure of the title compound has been determined by X-ray diffraction methods. It crystallizes in the monoclinic space group P21/n with cell parameters a = 7.097(1) A, b = 19.257(1) A, c = 10.893(1) A, β = 106.17(2)∘, V = 1429.8(3)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18e9151022efc7f99eb800c0cf95fbe6
https://doi.org/10.1007/s10870-005-1671-4

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