A concise synthesis of the yellow pigment benzylthiocrellidone 1, based on a Michael addition–elimination of dimedone 2 to the ketene thioacetal 7 derived from dimedone, benzyl bromide and carbon disulfide, is described. The synthetic pigment had an X-ray crystal structure identical to that measured for the natural product.
H. Wai Lam, P. A. Cooke, G. Pattenden, W. M. Bandaranayake and W. A. Wickramasinghe, J. Chem. Soc., Perkin Trans. 1, 1999, 847 DOI: 10.1039/A901323G
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