Syntheses of Aromatic Substituted Hydrazino-thiazole Derivatives to Clarify Structural Characterization and Antioxidant Activity between 3-Arylsydnonyl and Aryl Substituted Hydrazino-thiazoles
作者:Mei-Hsiu Shih、Yu-Sheng Su、Cheng-Ling Wu
DOI:10.1248/cpb.55.1126
日期:——
ORTEP drawings of compounds 8g, 8h and 9f provide strong evidence of the structure of aromatic thiazole derivatives 8a-h and 9a-h. Undoubtedly, the structure of compounds 3e-h and 4e-h synthesized by the reaction of 3-aryl-4-formylsydnone thiosemicarbazones 1e-h with cyclization reagents 2a and 2b in the previous work should have the thiazole moiety, and not the thiazoline moiety. Both the new thiazole
通过进一步合成一系列芳族环取代的肼基-噻唑衍生物8a-h和9a-h,这项工作阐明了芳族和3-芳基丁二酰基取代的肼基-噻唑之间的结构特征和抗氧化活性。通过使芳族或杂环芳族醛硫代半咔唑酮7a-h与环化试剂2-氯乙酰乙酸乙酯(2a)和2-溴苯乙酮(2b)反应获得肼基噻唑衍生物8a-h和9a-h。化合物8g,8h和9f的ORTEP图提供了芳族噻唑衍生物8a-h和9a-h结构的有力证据。毫无疑问,在先前的工作中,由3-芳基-4-甲酰基亚砜基硫代半碳唑酮1e-h与环化试剂2a和2b反应合成的化合物3e-h和4e-h应当具有噻唑部分,而不是噻唑啉部分。新的噻唑衍生物8a-h和9a-h以及3-芳基丁二酰基取代的衍生物3e-h和4e-h均通过两项已被充分证明的试验进行了研究,以确定它们的抗氧化活性-对稳定剂的直接清除作用游离的1,1-二苯基-2-吡啶并肼基(DPPH)和对2,2-叠氮基双(3-乙基苯并噻唑啉