ChemInform Abstract: Phosphorylation of 2-Alkoxycarbonyl-5-(1′,3′-diaza-1′-butenyl-3′-methyl)thiophenes and 2-Alkoxycarbonyl-5-(1′,3′-diaza-1′-butenyl-3′-methyl)furans by Trivalent Phosphorus Halides.

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