AL (H2PO4)3 AS AN EFFICIENT AND REUSABLE CATALYST FOR THE MULTI-COMPONENT SYNTHESIS OF HIGHLY FUNCTIONALIZED PIPERIDINES AND DIHYDRO-2-OXYPYRROLES

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SAJADIKHAH SEYED SAJAD; HAZERI NOURALLAH; MAGHSOODLOU MALEK TAHER; HABIBI KHORASSANI SAYYED MOSTAFA; BEIGBABAEI ADEL; WILLIS ANTHONY C.

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ISSN: 2588-4824

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Journal: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS) Year:621 | Volume:10 | Issue:5 Page(s): 863-871

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Title

AL (H2PO4)3 AS AN EFFICIENT AND REUSABLE CATALYST FOR THE MULTI-COMPONENT SYNTHESIS OF HIGHLY FUNCTIONALIZED PIPERIDINES AND DIHYDRO-2-OXYPYRROLES

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Keywords

HETEROCYCLE

PIPERIDINE

DIHYDRO-2-OXYPYRROLE

MULTI-COMPONENT REACTION

REUSABLE CATALYST

AL (H2PO4)3

Abstract

Extremely facile and efficient procedures have been developed for the synthesis of highly functionalized PIPERIDINEs and DIHYDRO-2-OXYPYRROLEs via one-pot MULTI-COMPONENT REACTIONs in the presence of Al (H2PO4)3 as a heterogeneous and eco-friendly catalyst under mild conditions. The MULTI-COMPONENT REACTION of aromatic aldehydes, aromatic amines, and b-keto esters catalyzed by Al (H2PO4)3 in EtOH at room temperature provides highly functionalized PIPERIDINEs in good to excellent yields. The structure as well as the relative stereochemistry of these functionalized PIPERIDINEs was confirmed by single X-ray crystallographic analysis. The same catalyst was found useful for the synthesis of polyfuntionalized DIHYDRO-2-OXYPYRROLEs using a four-component reaction of amines, dialkyl acetylenedicarboxylates and formaldehyde in MeOH at ambient temperature. It is found that the catalyst is recyclable and can be used up to five times without significant loss of its activity.

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HAZERI, NOURALLAH. (). . , (), -. SID. https://sid.ir/paper/282892/en

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HAZERI NOURALLAH. . [Internet]. ;():-. Available from: https://sid.ir/paper/282892/en

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NOURALLAH HAZERI, “,” , vol. , no. , pp. –, , [Online]. Available: https://sid.ir/paper/282892/en

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