Heterocyclization of functionalized heterocumulenes with C,N-, C,O, and C,S-binucleophiles: IX. Reaction of 1-aryl-1-chloro-2,2,2-trifluoroethyl isocyanates with sulfanylacetic acid esters as a convenient synthetic route to 2-aryl-2-trifluoromethyl-4-oxo-1,3-thiazolidine-5-carboxylates