5-磺基水杨酸催化两相法合成某些二茂钛衍生物

Synthesis of Titanocene Derivatives Catalyzed by 5 - Sulfosalicylic Acid in a Two - Phase System

首次利用５－磺基水杨酸作为催化剂合成了９种二茂钛衍生物，经元素分析，ＵＶ－ｖｉｓ，ＩＲ及＾１Ｈ ＮＭＲ等对配合物结构进行了表征，并利用电子吸收光谱对取代水杨酸参与反应的机理进行了探讨，同时发现，５－磺基水杨酸水溶液也可用于二氯二茂钛的分离，并且非常有效。

A new synthetic method featuring using 5 - sulfosalicylic acid as catalyst to prepare nine titanocene derivatives is reported. The title complexes were characterized by elemental analysis, UV - vis, IR and 1H NMR spectroscopy. Based on the UV - vis spectrum, the mechanism of synthetic complexes is proposed as follows: first, Cp2TiCl2 in the organic phase reacts interfacially with 5 - sulfosalicylic acid in the aqueons phase to form an intermediate. The resulting species undergoes an interfacial interaction with substituted salicylic acid to form the final complexes, which stay in the organic phase. Then the 'Cp2Ti' species return to the organic phase while 5 - sulfosalicylic acid remains in the water phase.