An Efficient Synthesis of Tetraalkyl 2,3,4,5-Thiophenetetracarboxylate Derivatives
作者:Abdolali Alizadeh、Reza Hosseinpour
DOI:10.1055/s-0029-1216808
日期:2009.6
A facile and direct synthetic entry to tetraalkyl 2,3,4,5-thiophenetetracarboxylate derivatives is described. This involves the reaction of dialkyl acetylenedicarboxylates with elemental sulfur in the presence of triethyl phosphite or an N-heteroaromatic compound such as isoquinoline, 1-methyl-1H-imidazole, or pyridine as catalyst.
本文介绍了一种简便直接的 2,3,4,5-噻吩四羧酸四烷基衍生物合成方法。这涉及到乙炔二羧酸二烷基酯与元素硫在亚磷酸三乙酯或 N-杂芳香族化合物(如异喹啉、1-甲基-1H-咪唑或吡啶)作为催化剂存在下的反应。