Papers by Suryakant Sapkal
European Chemical Bulletin, 2019
Ionic liquid catalyzed one-pot synthesis of hexahydroquinoline derivatives using substituted aryl... more Ionic liquid catalyzed one-pot synthesis of hexahydroquinoline derivatives using substituted aryl aldehydes, dimedone, malononitrile and ammonium acetate has been described under microwave irradiation. The protocol has been utilized mild reaction conditions, excellent yield, shorter reaction time and simple workup procedure. The synthesized derivatives were obtained in 80-95% yields and were characterized by IR, 1 H NMR, and mass spectra.
Bulletin of the Korean Chemical Society, 2009
An efficient and easy method for one-pot three-component synthesis of amidoalkyl naphthols by the... more An efficient and easy method for one-pot three-component synthesis of amidoalkyl naphthols by the condensation of aromatic/heteroaromatic/aliphatic aldehydes, 2-naphthol and amides or urea under thermal condition at 60 o C in the presence of acidic ionic liquid 1-butyl-3-methylimidazolium hydrogen sulphate ([bmim]HSO4) has been described.
Journal of the Korean Chemical Society, 2010
An efficient and simplified protocol for NaHSO4/SiO2 catalyzed solvent-free synthesis of β-enamin... more An efficient and simplified protocol for NaHSO4/SiO2 catalyzed solvent-free synthesis of β-enaminone and 2-methylquinolin-4(1H)-one derivatives under microwave irradiation is described. A series of functionalized derivatives have been synthesized in shorter reaction times with moderate to good yields. The use of milder catalyst in non-conventional method offers significant advantages over conventional methods, such as higher selectivities, simplicity, solvent-free reaction and non-environmental polluting conditions.
Asimple synthesis of 3-(5-aryl-[1,3,4]oxadiazole-2-yl)-1Hindazole derivatives by the condensation... more Asimple synthesis of 3-(5-aryl-[1,3,4]oxadiazole-2-yl)-1Hindazole derivatives by the condensation of 1Hindazole-3-carboxylic acid hydrazide and aromatic acids in the presence of phosphorus oxychloride undermicrowave irradiation in excellent yields.
ChemInform, 2010
3. ChemInform Abstract ChemInform is a weekly Abstracting Service, delivering concise information... more 3. ChemInform Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full ...
ChemInform, 2010
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Tetrahedron Letters, 2009
... We gratefully acknowledge the financial assistance received for this work from the University... more ... We gratefully acknowledge the financial assistance received for this work from the University Grants Commission, New Delhi, and also thank Dr. Ramphal Sharma, Thin Film and Nanotechnology Laboratory ... 2 F. Alonso, P. Riente and M. Yus, Tetrahedron 64 (2008), p. 1847. ...
Chemistry of Heterocyclic Compounds, 2010
Some new 4,5-diphenyl-1H-imidazole derivatives were synthesized in good yields by treating variou... more Some new 4,5-diphenyl-1H-imidazole derivatives were synthesized in good yields by treating various tetrazolo[1,5-a]quinolines with benzil and ammonium acetate in glacial acetic acid.
Green Chemistry Letters and Reviews, 2010
An efficient synthesis of 5-arylidine 2,4-thiazolidinediones by the Knoevenagel condensation of a... more An efficient synthesis of 5-arylidine 2,4-thiazolidinediones by the Knoevenagel condensation of aromatic aldehydes with 2,4-thiazolidinedione using 1-benzyl-3-methylimidazolium dihydrogen phosphate ([bnmim]H 2 PO 4) acidic ionic liquid at 70°C. This method gives remarkable advantages such as simple procedure, reactions at mild condition, much faster (50-90 min) reactions, excellent yield of products and the ionic liquid was successfully reused for four cycles without significant loss of activity.
Green Chemistry Letters and Reviews, 2009
The green, mild, and efficient synthesis of 2, 2-dimethyl-5-[(4-oxo-4H-chromen-3-yl) methylene]-1... more The green, mild, and efficient synthesis of 2, 2-dimethyl-5-[(4-oxo-4H-chromen-3-yl) methylene]-1, 3-dioxane-4, 6-diones by Knoevenagel condensation of 4-oxo-4H-benzopyran-3-carbaldehydes with Meldrum's acid in presence of 1-benzyl-3-methylimidazolium chloride ((bnmim)(Cl)) ionic liquid at room temperature is reported. This method gives remarkable advantages such as a simple procedure, mild conditions, faster (10Á20 min) reactions, and excellent yields. Additionally, the (bnmim)(Cl) was successfully recycled at least four times without significant loss of activity.
Green Chemistry Letters and Reviews, 2010
... Shelke b , Suryakant B. Sapkal b , Gopal K. Kakade b & Murlidhar S. Shingare ... more ... Shelke b , Suryakant B. Sapkal b , Gopal K. Kakade b & Murlidhar S. Shingare b * pages 269-273. ... Planta Med , 58(6): 533534. [CrossRef], [PubMed], [Web of Science ®] View all references, anti-oxidant 1111. Tripathi, YB, Sharma, M. and Manickam, M. 1997. Indian J. Biochem. ...
Green Chemistry Letters and Reviews, 2009
Page 1. ORIGINAL ARTICLE Dual role of ammonium acetate for solvent-free synthesis of 1,3-disubsti... more Page 1. ORIGINAL ARTICLE Dual role of ammonium acetate for solvent-free synthesis of 1,3-disubstituted-2,3-dihydro-1H-naphth-[1,2e] [1,3]-oxazine Suryakant B. Sapkal, Kiran F. Shelke, Amol H. Kategaonkar and Murlidhar S. Shingare* ...
Chinese Chemical Letters, 2009
2,4,5-Triarylimidazoles could be obtained in excellent yields by the one-pot three-component cond... more 2,4,5-Triarylimidazoles could be obtained in excellent yields by the one-pot three-component condensation of benzil/benzoin, aldehydes and ammonium acetate in the presence of catalytic amount of the inexpensive, readily available and non-toxic ceric (IV) ammonium nitrate (CAN) in aqueous media under ultrasound at room temperature. In this reaction the products were obtained in short reaction time and easy operation under mild conditions.
Chinese Chemical Letters, 2009
Boric acid (BO3H3) is an inexpensive, efficient and mild catalyst for the synthesis of 1,1-diacet... more Boric acid (BO3H3) is an inexpensive, efficient and mild catalyst for the synthesis of 1,1-diacetate (acylal) from the various aromatic and heteroaryl aldehydes with acetic anhydride at room temperature under solvent-free condition. The present method does not involve any hazardous organic solvents or catalysts. This method gives notable advantages such as excellent chemoselectivity, mild reaction condition, short reaction times and
Central European Journal of Chemistry, 2010
A green, mild and efficient method for Knoevenagel condensation of 3-formylchromone/2-chlroquinol... more A green, mild and efficient method for Knoevenagel condensation of 3-formylchromone/2-chlroquinoline-3-carbaldehyde with active methylene compounds such as Meldrum’s acid/ethyl cyanoacetate using biosupported cellulose sulphuric acid (CSA) in the solid-state by grinding under solvent-free condition has been developed. This method provides several advantages including environmental friendliness, shor t reaction times, high yields and a simple work-up procedure. Moreover, the CSA was successfully reused for four cycles without significant loss of activity.
Journal of the Korean Chemical Society
NaHSO4, TBAB (phase transfer catalyst), ionic liquid (IL) (1-butyl-3-methyl imidazolium hydrogen ... more NaHSO4, TBAB (phase transfer catalyst), ionic liquid (IL) (1-butyl-3-methyl imidazolium hydrogen sul-phate [bmim]HSO4)를 사용하여, formalin, β-naphthol, aromatic amines을 반응시켜서 대응하는 2,3-dihydro-2-phenyl-1H-naphtho-[1,2-e] [1,3] oxazine 유도체를 합성할 수 있는 보다 친환경적이고, 수율이 좋고, 크로마토그래피 분리 방법을 사용하 지 않는 합성 방법을 개발하였다. ABSTRACT. Sodium hydrogen sulphate (NaHSO4), n-tetra butyl ammonium bromide (TBAB) as a phase transfer catalyst (PTC) in water, and 1-butyl-3-methyl imidazolium hydrogen sulphate [bmim]HSO4 as ionic liquid (IL) has been used as a mild reaction promoter for the cyclocondensation of formalin, β-naphthol and aromatic amines to afford respective 2,3-dihydro-2-phenyl-1H-naphtho-[1,2-e] [1,3] oxazine derivatives. The present protocols are greener, high yielding and involved the non-chromatographic isolation procedure.
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Papers by Suryakant Sapkal