Efficient and versatile catalysis of N-alkylation of heterocyclic amines with alcohols and one-pot synthesis of 2-aryl substituted benzazoles with newly designed ruthenium(<scp>ii</scp>) complexes of PNS thiosemicarbazones
作者:Rangasamy Ramachandran、Govindan Prakash、Sellappan Selvamurugan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki、Venkatachalam Ramkumar
DOI:10.1039/c4dt00006d
日期:——
or As, L = 2-(2-(diphenylphosphino)benzylidene) thiosemicarbazone (PNS-H), 2-(2-(diphenylphosphino)benzylidene)-N-methylthiosemicarbazone (PNS-Me), 2-(2-(diphenylphosphino)benzylidene)-N-phenylthiosemicarbazone (PNS-Ph)) have been synthesized and characterized by elemental analysis and spectroscopy (IR, UV-Vis, 1H, 13C, 31P-NMR) as well as ESI mass spectrometry. The molecular structures of complexes
钌(II)羰基配合物,具有膦基官能化的PNS型硫代半碳酰胺配体[RuCl(CO)(EPh 3)(L)](1-6)(E = P或As,L = 2-(2-(2-(二苯基膦基))亚苄基)缩氨基硫脲(PNS-H ),2-(2-(二苯基膦基)亚苄基) - ñ -methylthiosemicarbazone (PNS-ME),2-(2-(二苯基膦基)亚苄基) - ñ -phenylthiosemicarbazone(PNS-PH))已通过元素分析和光谱法(IR,UV-Vis,1 H,13 C,31P-NMR)以及ESI质谱。配合物的分子结构1,2和6通过单晶X射线衍射分析来进行鉴定。分析表明,所有配合物均具有扭曲的八面体几何形状,配体以单负三齿PNS方式进行配位。所有钌络合物(1-6)均作为杂芳族胺与醇进行N-烷基化的催化剂进行了测试。值得注意的是,发现配合物2是用于多种杂环胺与醇的N-烷基化的非常