Synthesis, structure and cytotoxicity of trimethylsilyl oligothienylcarbaldehydes and their derivatives
作者:Edmunds Lukevics、Giovanna Barbarella、Pavel Arsenyan、Irina Shestakova、Sergey Belyakov、Juris Popelis、Olga Pudova
DOI:10.1016/s0022-328x(01)00835-x
日期:2001.11
Trimethylsilyl end-capped bi- and terthiophene carbaldehydes were prepared by reaction of bi- and terthienyl lithium with DMF. Condensation of 5-trimethylsilyl-2,2′-bithiophene-5′-carbaldehyde with dinitrile of malonic acid gave silylbithienyl methylidenedinitrile in good yield, while reaction with hydroxylamine was accompanied by desilylation. The reaction of hydroxylamine with silylbithienyldinitrile
通过联和叔噻吩基锂与DMF的反应制备三甲基甲硅烷基封端的联噻吩和对噻吩甲醛。5-三甲基甲硅烷基-2,2'-联噻吩-5'-甲醛与丙二酸二腈缩合可得到高收率的甲硅烷基苯噻吩基甲基化二烯腈,而与羟胺的反应则伴随着甲硅烷基化反应。羟胺与甲硅烷基二苯甲基二腈的反应导致形成2- [5-(5'-三甲基甲硅烷基-2,2'-二苯甲基)亚甲基]丙二酸双酰胺肟。在体外研究了联噻吩和对噻吩衍生物对两种单层肿瘤细胞系MG-22A(小鼠肝癌)和HT-1080(人纤维肉瘤)的细胞毒性作用。通过X射线衍射研究了5-三甲基甲硅烷基-2,2'-联噻吩-5'-甲醛的分子结构。