Multicomponent reactions of thiohydantoins, aromatic aldehydes, and cyanides in the presence of TiCl4 or BF3·OEt2 give either the mono-(IV) or bisadducts (VI). Activation of the thiohydantoin NH functionality by the C=S group is essential for this reaction, as the corresponding hydantoin (VIIb) does not react. -(GAO, F.; ZHANG, G.; ZHANG, S.; CHENG, Y.; SHI, Z.; LI*, Y.; GAO, J.; Tetrahedron 63 (2007) 19, 3973-3981; Coll. Chem., Jilin Univ.,
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