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Regioselective Synthesis of Novel Functionalized Pyrano[2′,3′:4,5]pyrimido[1,6-b][1,2,4,5]triazaphosphepines

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Abstract

The reactions of 6-acetyl-3-amino-4-imino-7-methyl-5-phenyl-3,5-dihydro-4H-pyrano[2,3-d]pyrimidine with triethyl phosphite and some electrophilic reagents, namely 1,2-dibromoethane, oxalyl chloride, chloroacetyl chloride, and ethyl chloroacetate, were studied. These one-pot three-component reactions regioselectively afforded four new 11-acetyl-2-ethoxy-10-methyl-12-phenylpyrano[2′,3′:4,5]pyrimido[1,6-b][1,2,4,5λ5]triazaphosphepin-2-ones in 69–73% yields.

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Funding

The authors thank “The Research Center for Advanced Materials Science (RCAMS)” at King Khalid University for funding this work under grant no. RCAMS/KKU/017-20.

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Correspondence to T. E. Ali.

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Ali, T.E., Assiri, M.A., Yahia, I.S. et al. Regioselective Synthesis of Novel Functionalized Pyrano[2′,3′:4,5]pyrimido[1,6-b][1,2,4,5]triazaphosphepines. Russ J Org Chem 57, 79–84 (2021). https://doi.org/10.1134/S1070428021010115

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