Hw. Lam et al., Structure and total synthesis of benzylthiocrellidone, a novel dimedone-based vinyl sulfide from the sponge Crella spinulata, J CHEM S P1, (8), 1999, pp. 847-848
A concise synthesis of the yellow pigment benzylthiocrellidone 1, based on
a Michael addition-elimination of dimedone 2 to the ketone thioacetal 7 der
ived from dimedone, benzyl bromide ana carbon disulfide, is described. The
synthetic pigment had an X-ray crystal structure identical to that measured
for the natural product.