1986
DOI: 10.1002/chin.198603268
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ChemInform Abstract: Dialkyl (1,2‐Epoxy‐3‐oxoalkyl)phosphonates as Synthons for Heterocyclic Carbonyl Compounds: Synthesis of Acy1‐Substituted Thiazoles, Indolizines, Imidazo[1,2‐a]‐pyridines and Imidazol[1,2‐a]pyrimidines.

Abstract: Die durch Oxidation aus den Oxoalkenylphosphonaten (I) dargestellten trans‐Epoxyphosphonate (II) reagieren mit Thioamiden zu den 1‐Hydroxy‐1‐thiazolylalkylphosphonaten (IV), mit Ethyl‐α‐pyridylacetat, 2‐Aminopyridin oder 2‐Aminopyrimidin zu den Indolizinylalkyl‐, den Imidazopyridinylalkyl‐ bzw. den Imidazopyrimidinylalkyl‐phosphonaten (V).

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“…The reaction mixtures were heated at reflux for 12–24 h. After evaporation of solvent under reduced pressure, the brown residues were collected and purified by silica gel flash chromatography, using hexane-ethyl acetate (9:1), to yield compounds 4a-i in the desired purity. Compounds 4a 16 and 4b 17 are previously reported. Characterizations of compounds 4c-i are listed in SI.…”
Section: Methodsmentioning
confidence: 93%
“…The reaction mixtures were heated at reflux for 12–24 h. After evaporation of solvent under reduced pressure, the brown residues were collected and purified by silica gel flash chromatography, using hexane-ethyl acetate (9:1), to yield compounds 4a-i in the desired purity. Compounds 4a 16 and 4b 17 are previously reported. Characterizations of compounds 4c-i are listed in SI.…”
Section: Methodsmentioning
confidence: 93%