The present invention relates to a method for synthesizing a 2-benzylidene tetrahydrothiophene derivative, which comprises the step of reacting a (cyclopropylethynyl) aromatic cyclic compound of Formula (I) with a sulfur source in an organic solvent as a reaction medium in air atmosphere at 100-200° C. to obtain a 2-benzylidene tetrahydrothiophene derivative of Formula (III). The reaction route is as follows:
where Ar is selected from phenyl ring, a substituted phenyl ring, biphenylyl, thiophenyl ring or naphthyl ring, in which the substituent on the substituted phenyl ring is selected from the group consisting of halo, trifluoromethyl, cyano, a C1-C20 alkyl group and any combination thereof; and R1 is selected from hydrogen or a C1-C20 alkyl group. The method of the present invention has the advantages of simple reaction conditions, convenient post-treatment, environmental friendliness, and requiring no transition metal catalysis.
本发明涉及一种合成2-亚苄基
四氢噻吩衍
生物的方法,该方法包括以下步骤:将式(I)的(环丙基
乙炔基)芳香环状化合物与
硫源在有机溶剂中作为反应介质,在空气气氛中于100-200℃反应,得到式(III)的2-亚苄基
四氢噻吩衍
生物。反应路线如下
其中 Ar 选自苯基环、取代的苯基环、
联苯环、
噻吩环或
萘环,其中取代的苯基环上的取代基选自卤、三
氟甲基、
氰基、C1-C20 烷基及其任意组合组成的组;以及 R1 选自氢或 C1-C20 烷基。本发明的方法具有反应条件简单、后处理方便、环保、无需过渡
金属催化等优点。