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Strukturelle Abwandlungen an Nukleotiden, Nukleosiden und Nukleosidbasen mit β-Acylvinylphosphoniumsalzen

Reactions with phosphororganic compounds, XXXVI1. structural transformations on nucleotides, nucleosides and nucleoside bases using β-acylvinylphosphonium salts

Reaktionen mit phosphororganischen Verbindungen, 36. Mitt.

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Abstract

β-Acetylvinyl-triphenylphosphonium bromide1 reacts with CMP to form the 3,N4-etheno-derivative {[6-(5′-phosphoribofuranosyl)-2-methyl-5-oxo-imidazo [1.2-c]pyrimidin-3-yl]-methyl}triphenyl-phosphonium bromide (2). Guanine affords mainly the lin. condensation product [(6-methyl-9-oxo-imidazo[1.2-a]-purin-7-yl)-methyl]triphenylphosphonium bromide (3) and the angular tricyclic product [(6-methyl-9-oxo-imidazo[2.1-b]purin-5-yl)-methyl]-triphenylphosphonium bromide (4). For comparison we synthesized the angular condensed heterocycle5, (6.8-dimethyl-9-oxo-imidazo[2.1-b]purin-5-yl)-methyl]triphenylphosphonium bromide, by reaction of 1-methylguanine with1, and the corresponding linear derivative6 [(4.6-dimethyl-9-oxo-imidazo[1.2-a]purin-7-yl)-methyl]-triphenylphosphoniumbromide from 3-methylguanine and1. AHofmann-type degradation of3 with the anion of diethyl malonate led to7, diethyl (6-methyl-9-oxo-imidazo[1.2-a]purin-7-yl)-methylmalonate, a compound whose structure resembles some Y-bases in t-RNA.Wittig reaction of the silylated nucleoside derivative8 a {[2-methyl-5-oxo-6-(2′.3′.5′-tris-trimethylsilyl)-ribofuranosyl-imidazo[1.2-c]pyrimidin-3-yl]methyl}-triphenylphosphonium bromide, with C6H5CHO resulted in the 2-methyl-3(ω-styryl)-6[2′.3′.5′-tris-(trimethylsilyl)]ribofuranosyl-imidazo[1.2-c] pyrimidin-5-one (9).

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Correspondence to Prof. Dr. Erich Zbiral.

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Ivancsics, C., Zbiral, E. Strukturelle Abwandlungen an Nukleotiden, Nukleosiden und Nukleosidbasen mit β-Acylvinylphosphoniumsalzen. Monatshefte für Chemie 106, 417–428 (1975). https://doi.org/10.1007/BF01150522

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