Summary. A series of novel 2-phenyliminothiazolidine derivatives were designed and synthesized. All title compounds were characterized by 1 H NMR and, in some cases, by 13 C NMR, IR, and HRMS. Their agricultural bioactivities were evaluated and some of these compounds exhibited efficient herbicidal activities against Echinochloa crusgalli, Sorghum vulgare, Digitaria sanguinalis, Eclipta prostrasta, Cucumis sativus, and Brassica ...