SCHEDULED MAINTENANCE
5,6-Dihydro-2,4-diphenylnaphtho[1,2-b]pyrylium thiocyanate is prepared in high yield. It reacts with primary arylamines to yield the corresponding fused pyridinium thiocyanates which when pyrolysed with a KNCS–NaCNS eutectic at ca. 220 °C give the aryl thiocyanates in yields averaging 80%.
A. R. Katritzky and S. S. Thind, J. Chem. Soc., Perkin Trans. 1, 1980, 865 DOI: 10.1039/P19800000865
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