Studies on the reactivity of some<i>N</i>-aryl- and<i>N</i>-heteroaryl-<i>N'</i>-alkylthioureas towards electrophilic reagents. Synthesis of new<i>N</i>-pyridylthioureas and thiazolines maría
作者:Isabel Rodríguez-Franco、Isabel Dorronsoro、Ana Martínez、Ana Castro
DOI:10.1002/jhet.5570380220
日期:2001.3
Here in we describe our findings about the behaviour of some N-aryl- and N-heteroaryl-N'-alkylthioureas towards electrophilic reagents. In acid medium, the treatment of thioureas bearing aryl groups with 4-chloropyridine in 2-propanol yielded N-aryl-N-(4-pyridyl)-N'-alk;ylthioureas and N-aryl-N'-alkylureas, whereas the heteroarylthioureas tested under similar reaction conditions afforded N-heteroa
在这里,我们将介绍有关的一些行为,我们的研究结果ñ -芳基-和ñ杂芳基- N”对亲电试剂-alkylthioureas。在酸性介质中,硫脲轴承的芳基的在2-丙醇4-氯吡啶处理得到Ñ -芳基- ñ - (4-吡啶基) - N“ -alk; ylthioureas和ñ -芳基- N” -alkylureas,而在类似反应条件下测试的杂芳基硫脲得到N-杂芳基-N'-烷基-O-(2-丙基)异脲。的反应ñ - (5,6,7,8-四氢萘-1-基) -和Ñ-(2-苯并咪唑基)-N'-丁基-硫脲与炔丙基溴在酸性介质中以区域选择性方式导致形成2-丁基亚氨基-3-芳基噻唑啉。然而,当该反应在碱性条件下进行时,区域选择性失败并且获得了异构体噻唑啉的混合物。通过分子建模和选择性核Overhauser核磁共振实验研究了合成的噻唑啉亚氨基的Z或E构型。