Výsledky vyhledávání - "Shayna Shamim"

Akademický článek

Ionic liquid promoted one pot approach for the synthesis of pyrido[1,2-c][1,3,5]thiadiazin-4-ones and thiazolo[3,2-c][1,3,5]thiadiazin-4-ones in water

Autor: I.R. Siddiqui, Arjita Srivastava, Anjali Srivastava, Shayna Shamim, Shireen, Malik Abdul Waseem

Publikováno v: Arabian Journal of Chemistry, Vol 11, Iss 2, Pp 256-264 (2018)

A novel three component one pot methodology for rapid access to pyrido[1,2-c][1,3,5]thiadiazin-4-ones and thiazolo[3,2-c][1,3,5]thiadiazin-4-ones has been developed. A task specific ionic liquid [bmIm]SCN has been used as thiocyanating reagent. The r

Externí odkaz: https://doaj.org/article/06db614610ec4084bce16bfa2cc2e73d

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Basic Ionic Liquid Promoted Domino Knoevenagel-Thia-Michael Reaction: An Efficient and Multicomponent Strategy for Synthesis of 1,3-Thiazines

Autor: Anjali Srivastava, Arjita Srivastava, Malik A. Waseem, Shayna Shamim, Rahila, Shireen, Ibadur R. Siddiqui, Pragati Rai

Publikováno v: Journal of Heterocyclic Chemistry. 53:1284-1291

An efficient, three-component strategy for synthesis of 1,3-thiazines with high atom economy in one-pot mediated by room temperature basic ionic liquid is described here. The strategy involves basic ionic liquid, [bmim]OH-catalyzed Knoevenagel conden

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d1d50afea539efcc20dc08584227ea4
https://doi.org/10.1002/jhet.2379

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An Efficient One-Pot Regioselective Approach Towards the Synthesis of Thiopyrano[2,3-d]thiazole-2-thiones Catalyzed by Basic Ionic Liquid under Microwave Irradiation

Autor: Shayna Shamim, Shireen, Malik A. Waseem, Anjali Srivastava, Ibadur R. Siddiqui, Arjita Srivastava

Publikováno v: Journal of Heterocyclic Chemistry. 53:849-858

A green, regioselective protocol for the synthesis of thiopyrano[2,3-d]thiazole-2-thiones catalyzed by basic ionic liquid [bmIm]OH has been developed. The reaction proceeds smoothly under microwave irradiation, and high yields of the products are obt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3c0eb8232c0fbed3460c5e94fe8f92a4
https://doi.org/10.1002/jhet.2314

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Solid-Supported Cyclocondensation of Arylglyoxal on Ribosylthiourea under Microwave Activation: A Novel and Efficient Synthesis of N-Glycosylated-2-thiohydantoins

Autor: Anjali Srivastava, Sanjay Yadav, Arjita Srivastava, Shayna Shamim, Shireen, Malik A. Waseem, Ibadur R. Siddiqui

Publikováno v: Bulletin of the Chemical Society of Japan. 87:506-510

Solid-supported, microwave-assisted efficient one-pot route to N-ribonucleosides of 2-thiohydantoin via reaction of ribosylthiourea and arylglyoxal has been developed. The strategy involves initial...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4707fa32fbfbff2033b494c896a7ec97
https://doi.org/10.1246/bcsj.20130138

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Microwave accelerated facile and efficient synthesis of piperido[3′,4′:5,6]pyrano[2,3-d] pyrimidinones catalyzed by basic ionic liquid [BMIM]OH

Autor: Anushree Srivastava, Anjali Srivastava, Afaf A. H. Abumhdi, Rahila, Arjita Srivastava, Ibadur R. Siddiqui, Shayna Shamim, Malik A. Waseem, Shireen, Pragati Rai

Publikováno v: Journal of Molecular Catalysis A: Chemical. 382:126-135

A basic ionic liquid [BMIM]OH could very efficiently catalyze the synthesis of piperido[3′,4′:5,6]pyrano[2,3-d]pyrimidinone derivatives from pyrano[3,2-c]piperidine analogues and carbonyl compounds. [BMIM]OH acted as a catalyst as well as the rea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04722b7a6b082d791f17c351b3aff1f4
https://doi.org/10.1016/j.molcata.2013.10.026

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Synthesis of imidazo[1,2-a]pyridine in the presence of iodine–water catalytic system

Autor: Ibadur R. Siddiqui, Pragati Rai, Shayna Shamim, Rahila, Anushree Srivastava

Publikováno v: Tetrahedron Letters. 55:1159-1163

We have devised an expedient, cleaner, and environmentally friendly approach for ‘on water’ mediated synthesis of imidazo[1,2- a ]pyridine derivatives. The synthesis involves in situ formation of imines followed by addition of alkyne to give the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b27e738f7020a1994973a09cce030453
https://doi.org/10.1016/j.tetlet.2013.12.088

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An InBr3 catalyzed one-pot three-component synthesis of functionalized spirodihydrofuran oxindoles via intramolecular alkyne carbonyl metathesis

Autor: Ibadur R. Siddiqui, Pragati Rai, Afaf A. H. Abumhdi, Rahila, Malik A. Waseem, Shayna Shamim, Shireen

Publikováno v: Tetrahedron Letters. 54:6991-6994

A new and convenient one-pot methodology for the reaction of N-methyl isatin, alkynes and phenacyl bromides to selectively afford spiro dihydrofuran oxindole derivatives catalyzed by indium bromide under ambient temperature conditions has been docume

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::37eb43db6c2c9376ad281fa614164dd7
https://doi.org/10.1016/j.tetlet.2013.09.122

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Highly Diastereoselective NHC-Catalyzed [4+3] Annulation of Enals, Aldehydes and N-Phenyl Urea/Thiourea for the Synthesis of Monocyclic trans-1,3-Diazepanes

Autor: Malik A. Waseem, Arjita Srivastava, Ibadur R. Siddiqui, Shayna Shamim, Shireen, Anjali Srivastava, Rana Krishna Pal Singh

Publikováno v: Synlett. 24:2586-2590

N-Heterocyclic carbene catalyzed synthesis of 1,3-diazepanes from α,β-unsaturated aldehydes, N-phenyl urea/thiourea and aromatic aldehydes has been developed. The reactive Breslow intermediate, formed by reaction of the enal with the NHC, attacks a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aa79808970b6782dc578f5c9eae48038
https://doi.org/10.1055/s-0033-1339894

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