Al-Masoudi NA, Saeed BA, Essa AH, Al-Soud YA. Microwave-assisted synthesis of acyclic C-nucleosides from 1,2- and 1,3-diketones.
NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2009;
28:175-83. [PMID:
19333856 DOI:
10.1080/15257770902830997]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A simple, rapid and regioselective approach for the synthesis of C-acyclic nucleosides 3, 4, 6, and 9 of dihydropyrimidine, imidazole and indeno[1,2-b]pyridine-9-one derived from 1,2- and 1,3-diketones was performed. By using DMF or pyridine as solvent or bentonite clay as a support, in the presence of TMSTf, ZnCl(2), NH(4)OAc, or NH(4)NO(3), all the desired products were obtained within 5-25 minutes under microwave irradiation (MWI). Acid hydrolysis of 6 and 9 afforded the free acyclic C-nucleosides 7 and 10, respectively. Upon treatment with NaOMe under MWI, 3 and 14 rearranged to the C-nucleoside 4 and 16.
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