A regioselective synthesis of 3-alkyl-2-[(anthracen-9-yl)imino]thiazolidin-4-ones 2a-2e and 2-(alkylimino)-3-(anthracen-9-yl)thiazolidin-4-ones 3a-3e from appropriate thioureas using methyl bromoacetate or bromoacetyl bromide, respectively, has been rationalized by DFT calculations of model thiourea and its phenyl derivative. The proposed mechanism indicates that the regioselective formation of the target thiazolidinones is a consequence of a different reactivity of the reagents and a varying stability of the intermediates, 1-alkyl-3-(anthracen-9-yl)-2-[(methoxycarbonyl)methyl]isothioureas 4a-4e and 1-alkyl-3-(anthracen-9-yl)-2-(bromoacetyl)isothioureas 6a-6e. 
使用
溴乙酸甲酯或
溴乙酰溴作为反应试剂,分别从适当的
硫脲合成了3-烷基-2-[(
蒽-9-基)
亚胺]
噻唑啉-4-酮2a-2e和2-(烷基
亚胺)-3-(
蒽-9-基)
噻唑啉-4-酮3a-3e。通过对模型
硫脲及其苯基衍
生物的DFT计算,合理解释了所述反应机理。所提出的机理表明,目标
噻唑啉酮的区域选择性形成是试剂反应活性和中间体1-烷基-3-(
蒽-9-基)-2-[(甲氧羰基)甲基]异
硫脲酰以及1-烷基-3-(
蒽-9-基)-2-(
溴乙酰)异
硫脲酰的稳定性不同的结果。