Abstract Synthesizing a variety of tetrahydrosalens from hydrolyzing 1,3‐bis(2′‐hydroxy‐5′‐substituted‐benzyl)imidazolidines with hydrochloric acid is described. Further reaction of such tetrahydrosalens with aldehydes yielded 2‐substituted‐1,3‐bis(2′‐hydroxy‐5′‐substituted‐benzyl)imidazolidines.