5-Bromoalkyl-2-iminothiazolidin-4-ones (3) were readily synthesized from 1, 3-disubstituted thioureas (1) and α, ω-dibromoacyl chlorides (2) in 5% NaOH-CH2Cl2. Compounds 3 were converted to the corresponding spiro compounds 9 under phase-transfer conditions or with sodium ethoxide.