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Synthesis of Novel Pyrimido Thiazine and Their Derivatives
Sirsat Shivraj Balajirao,
Jadhav Anilkumar Govindrao,
Kale Prashant Sambharao,
Jadhav Madhav Sopanrao
Issue:
Volume 5, Issue 2, June 2019
Pages:
23-26
Received:
18 May 2019
Accepted:
19 June 2019
Published:
29 June 2019
Abstract: In present report novel thiazines were prepared from starting materials chalcone and thiourea. The resulting compound 6-(4-methoxyphenyl) 4-phenyl-6H-1, 3-thiazin-2-amine (2) was further reacted with ethyl 2-cyano-3, 3-bis (methylthio) acrylate in the presence of catalytic amount of potassium carbonate in DMF under reflux condition that offered novel 2-(4-methoxyphenyl) 8-(methylthio)-6-0xo-4-phenyl-4, 6, 9, 9a-tetrahydropyrimido [2, 1-b] [1, 3]-thiazine-7-carbonitrile (3). The synthesized compounds were characterized by spectral methods. The compound (3) possesses replaceable methylthio (-SCH3) group at 8 position. The compound (3) react with various nucleophiles like substituted aromatic amines, aromatic phenols, hetryl amines and active methylene compounds to give 2-(4-methoxyphenyl)-8-substituted-6-oxo-4-phenyl-4, 6, 9, 9a-tetrahydropyrimido [2, 1-b] [1, 3] thiazine-7-carbonitrile in good yields.
Abstract: In present report novel thiazines were prepared from starting materials chalcone and thiourea. The resulting compound 6-(4-methoxyphenyl) 4-phenyl-6H-1, 3-thiazin-2-amine (2) was further reacted with ethyl 2-cyano-3, 3-bis (methylthio) acrylate in the presence of catalytic amount of potassium carbonate in DMF under reflux condition that offered nov...
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Antimicrobial Activity of Mn Complexes Incorporating Schiff Bases: A Short Review
Sharif Uddin,
Md. Saddam Hossain,
Md. Abdul Latif,
Md. Rabiul karim,
Ranjan K. Mohapatra,
Md. Kudrat-E-Zahan
Issue:
Volume 5, Issue 2, June 2019
Pages:
27-36
Received:
8 May 2019
Accepted:
12 June 2019
Published:
1 July 2019
Abstract: Antibiotic resistance has been growing at an anxious rate and as a result the activity of antibiotics against Gram-negative and Gram-positive bacteria has dropped dramatically day by day. Metal ions play many critical functions in humans. Deficiency of some metal ions can lead to disease like pernicious anemia, growth retardation, heart disease in infants etc. In this sense there is a strong need to synthesis new substances that not only have good spectrum of activity, but having new mechanisms of action. Inorganic compounds particularly Mn metal complexes have played an important role in the development of new metal based drugs. Over the past few years, there have been many reports on their applications in homogeneous and heterogeneous catalysis. The activity is usually increased by complexation therefore to understand the properties of both ligands and metal can lead to the synthesis of highly active compounds. The influence of certain metals on the biological activity of these compounds and their intrinsic chemical interest as multidentate ligands has prompted a considerable increase in the study of their coordination behavior. Development of a new chemotherapeutic Schiff bases and their metal complexes is now attracting the attention of medicinal chemists. In this review we have focused on research of Mn complexes incorporation of Schiff bases carry out over the past few decades which has sought to possess preclinical pharmacological screenings like anti-bacterial, anti-fungal, anti-tuberculosis, anti-inflammatory, anti-cancer, DNA- interaction and anti-tumor action of synthetic metal complexes.
Abstract: Antibiotic resistance has been growing at an anxious rate and as a result the activity of antibiotics against Gram-negative and Gram-positive bacteria has dropped dramatically day by day. Metal ions play many critical functions in humans. Deficiency of some metal ions can lead to disease like pernicious anemia, growth retardation, heart disease in ...
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Synthesis, Spectrometric Characterization, X-Ray Crystallography and Quantum Chemical Calculations of 2-oxo-2H-chromen-7-yl Propionate
Akoun Abou,
Abdoulaye Djandé,
Bintou Sessouma,
Rita Kakou Yao,
Olivier Ouari,
Adama Saba
Issue:
Volume 5, Issue 2, June 2019
Pages:
37-48
Received:
17 June 2019
Accepted:
12 July 2019
Published:
24 July 2019
Abstract: The title compound, (I), has been solved by direct methods and refined to a final R value of 0.038 for 1835 independent reflections. In the structure, the planar [r.m.s deviation = 0.014 Å] chromen-2-one ring and the 7-propionate side chain are inclined to one another at an acute angle of 65.34(9)°. The molecules form R44 (30) tetrameric units via C—H···O interactions which extend into layers approximately parallel to the ab plane. Furthermore, the crystal structure is supported by π–π stacking interactions between neighbouring benzene and pyrone or coumarin rings [centroid–centroid distances in the range 3.6097(8)–3.6475(9)Å], as well as C–H···π interactions [H···centroid distances in the range 2.95–3.00Å]. The molecular geometry of (I) was also optimized using density functional theory (DFT/RB3LYP), RMP2 and RHF methods with the 6-311++G(d, p) basis set in ground state. The theoretical data resulting from these quantum chemical calculations are in good agreement with the observed structure, although the observed C—O—C—C torsion angle between the coumarin ring system and the 7-propionate side chain (121.49 (16)°) is somewhat lower than the DFT/RB3LYP calculated value (132.32°) and larger than the RMP2 (114.65°) and the RHF (69.19°) values. Hirshfeld surface analysis has been used to confirm and quantify the supramolecular interactions.
Abstract: The title compound, (I), has been solved by direct methods and refined to a final R value of 0.038 for 1835 independent reflections. In the structure, the planar [r.m.s deviation = 0.014 Å] chromen-2-one ring and the 7-propionate side chain are inclined to one another at an acute angle of 65.34(9)°. The molecules form R44 (30) tetrameric units via ...
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