Abstract
AbstractThe reaction of 3,5‐di‐tert‐butyl‐4‐oxo‐2,5‐cyclohexadienylidene (3d) with pyridine affords 2,6‐di‐tert‐butyl‐4‐(2,4,6‐tri‐tert‐butylpyridinio)phenolate (1d) — which is not accessible by the classical route via pyrylium salts — in reasonable yield. Carbene 3d is generated by thermal decomposition of the corresponding quinone diazide 2d in cyclohexane. Betaine 1d shows the expected large solvatochromism.
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