SYNTHESIS OF 1,4 DIHYDROPYRIDINE (DHP) DERIVATIVES OVER CO/MONTMORILLONITE AS AN EFFICIENT CATALYSTS

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MOHAMMAD SEFAT MILAD; TABATABAEIAN KHALIL; MAMAGHANI MANOUCHEHR

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Seminar: IRANIAN INORGANIC CHEMISTRY CONFERENCE
Year:2014 | Issue:16

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Title

SYNTHESIS OF 1,4 DIHYDROPYRIDINE (DHP) DERIVATIVES OVER CO/MONTMORILLONITE AS AN EFFICIENT CATALYSTS

Author(s)

MOHAMMAD SEFAT MILAD | TABATABAEIAN KHALIL | MAMAGHANI MANOUCHEHR | Issue Writer Certificate

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Abstract

1,4-DHPS WERE KNOWN AS A CLASS OF SIGNIFICANTLY IMPORTANT AND BROADLY CONCERNED HETEROCYCLIC SCAFFOLDS. OWING TO THEIR SPLENDID PHARMACEUTICAL AND BIOLOGICAL PROFILES, 1,4-DHPS HAVE KEPT ATTRACTING WORLDWIDE INTERESTS FROM CHEMICAL AND MEDICINAL COMMUNITIES [1]. MONTMORILLONITE HAS USED FURTHER THAN OTHER MINERAL CLAYS DUE TO ITS PECULIAR PHYSIOCHEMICAL PROPERTIES. UNITARY LAYER OF MONTMORILLONITE (TOT, 2:1) HAS TWO SILICA TETRAHEDRAL (T) SHEETS BONDED TO A CENTRAL ALUMINA OCTAHEDRAL (O) SHEET. MONTMORILLONITE CRYSTALS CARRY A CHARGE ARISING FROM ISOMORPHOUS SUBSTITUTIONS OF CERTAIN ATOMS IN THEIR STRUCTURE FOR OTHER ATOMS OF A DIFFERENT VALENCE. WHEN THIS IS THE CASE, A CHARGE DEFICIENCY OCCURS AND A NEGATIVE POTENTIAL AT THE SURFACE OF THE CRYSTAL IS CREATED. THESE NEGATIVE CHARGES NEUTRALIZED BY CATIONS ARE HELD AT THE INTERLAYER SPACES. THE CATIONS ARE HYDRATED CATIONS OF NA+, CA2+ AND OCCASIONALLY K+. THE CATIONS IN THE INTERLAMINAR REGION OF NATURAL MONTMORILLONITE CAN BE EXCHANGED WITH OTHER IONS WHEN THE CLAY MINERAL IS BROUGHT IN TO CONTACT WITH ITS SALT SOLUTIONS. THE MOST FREQUENT USED METAL CATIONS IN THE PREPARATION OF CATION EXCHANGED CLAY OF CATALYTIC INTEREST ARE AL3+, FE3+, CR3+, ZN2+, MG2+, NI2+, CU2+ AND CO2+. THEY ARE KNOWN TO BE GOOD CATALYSTS BECAUSE OF THE DISSOCIATION OF WATER MOLECULES BY GENERATING BRONSTED ACIDITY [2]. THIS STUDY IS CONCERNED, CATION-EXCHANGED AND ACID-TREATED MONTMORILLONITES AS CATALYSTS FOR REACTIONS WHICH CAN BE CARRIED OUT ON A PREPARATIVE LABORATORY.

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APA: Copy

MOHAMMAD SEFAT, MILAD, TABATABAEIAN, KHALIL, & MAMAGHANI, MANOUCHEHR. (2014). SYNTHESIS OF 1,4 DIHYDROPYRIDINE (DHP) DERIVATIVES OVER CO/MONTMORILLONITE AS AN EFFICIENT CATALYSTS. IRANIAN INORGANIC CHEMISTRY CONFERENCE. SID. https://sid.ir/paper/913566/en

Vancouver: Copy

MOHAMMAD SEFAT MILAD, TABATABAEIAN KHALIL, MAMAGHANI MANOUCHEHR. SYNTHESIS OF 1,4 DIHYDROPYRIDINE (DHP) DERIVATIVES OVER CO/MONTMORILLONITE AS AN EFFICIENT CATALYSTS. 2014. Available from: https://sid.ir/paper/913566/en

IEEE: Copy

MILAD MOHAMMAD SEFAT, KHALIL TABATABAEIAN, and MANOUCHEHR MAMAGHANI, “SYNTHESIS OF 1,4 DIHYDROPYRIDINE (DHP) DERIVATIVES OVER CO/MONTMORILLONITE AS AN EFFICIENT CATALYSTS,” presented at the IRANIAN INORGANIC CHEMISTRY CONFERENCE. 2014, [Online]. Available: https://sid.ir/paper/913566/en

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