MICROWAVE ASSISTED SELECTIVE SYNTHESIS OF FOUR 
CHROMANONES VIA BISCYCLIZATION METHOD IN THE PRESENCE 
OF POLYPHOSPHORIC ACID AND CRYSTAL STRUCTURE 
DETERMINATION OF THEIR DICARBOXYLIC ACIDS

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SHOKRAVI A.; ALIZADEH R.; MOHEBBI L.; MORADI KOOCHI S.; MOGHIMI A.

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Journal Paper

Paper Information

Journal: Iranian Journal of Chemistry and Chemical Engineering Year:2004 | Volume:23 | Issue:2 Page(s): 37-44

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Title

MICROWAVE ASSISTED SELECTIVE SYNTHESIS OF FOUR CHROMANONES VIA BISCYCLIZATION METHOD IN THE PRESENCE OF POLYPHOSPHORIC ACID AND CRYSTAL STRUCTURE DETERMINATION OF THEIR DICARBOXYLIC ACIDS

Author(s)

Keywords

CHROMANONE

DICARBOXYLIC ACID

BISCYCLIZATION

MICROWAVE

CRYSTAL STRUCTURE.

Abstract

ABSTRACT: MICROWAVE irradiation is used in the synthesis of four tricyclic CHROMANONEs 11-14. The CHROMANONE 14 and 12 are selectively formed thermally and under MICROWAVE in the presence of polyphosphoric acid (PPA) from the same DICARBOXYLIC ACID 9, respectively. The CRYSTAL STRUCTURE. of the two diacids are also reported. The corresponding ortho and meta isomers of diacids crystallize in the space group Pbca of the orthorhombic system and C2/c of the monoclinic system respectively, with 8 and 4 molecules in the unit cells of dimensions a = 4.9955(1) A and 4.8092(4) A; b = 19.177(4) A and 11.5609(1)A; c = 25.885(5) A and 21.247(2)A; A = 90A and β = 91.214(3) degrees respectively. The structures have been refined to final values for the crystallographic R factors of 0.0401 and 0.0247, based on 2146 and 1030 observed independent reflections, respectively.

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APA: Copy

SHOKRAVI, A., ALIZADEH, R., MOHEBBI, L., MORADI KOOCHI, S., & MOGHIMI, A.. (2004). MICROWAVE ASSISTED SELECTIVE SYNTHESIS OF FOUR CHROMANONES VIA BISCYCLIZATION METHOD IN THE PRESENCE OF POLYPHOSPHORIC ACID AND CRYSTAL STRUCTURE DETERMINATION OF THEIR DICARBOXYLIC ACIDS . IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE), 23(2), 37-44. SID. https://sid.ir/paper/529677/en

Vancouver: Copy

SHOKRAVI A., ALIZADEH R., MOHEBBI L., MORADI KOOCHI S., MOGHIMI A.. MICROWAVE ASSISTED SELECTIVE SYNTHESIS OF FOUR CHROMANONES VIA BISCYCLIZATION METHOD IN THE PRESENCE OF POLYPHOSPHORIC ACID AND CRYSTAL STRUCTURE DETERMINATION OF THEIR DICARBOXYLIC ACIDS . IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE)[Internet]. 2004;23(2):37-44. Available from: https://sid.ir/paper/529677/en

IEEE: Copy

A. SHOKRAVI, R. ALIZADEH, L. MOHEBBI, S. MORADI KOOCHI, and A. MOGHIMI, “MICROWAVE ASSISTED SELECTIVE SYNTHESIS OF FOUR CHROMANONES VIA BISCYCLIZATION METHOD IN THE PRESENCE OF POLYPHOSPHORIC ACID AND CRYSTAL STRUCTURE DETERMINATION OF THEIR DICARBOXYLIC ACIDS ,” IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE), vol. 23, no. 2, pp. 37–44, 2004, [Online]. Available: https://sid.ir/paper/529677/en

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