PREVIOUSLY reported work1 from this laboratory indicated the feasibility of condensing 2-halo-3-thenoic acids to form symmetrically substituted 2,2′-bithienyls. This provided the experimental basis for the continuation of our studies in the field of mixed bi-aromatics, wherein it was shown2 that an unsymmetrically substituted α-phenylthiophene actually exists in two stereoisomeric forms due to restricted
                                    该实验室之前报道的工作表明,将 2-halo-3-thenoic 酸缩合形成对称取代的 2,2'-二
噻吩基是可行的。这为我们在混合双
芳烃领域继续研究提供了实验基础,其中表明,由于旋转受限,不对称取代的 α-苯基
噻吩实际上以两种立体异构形式存在。鉴于这一事实,将上述方法应用于3-卤代-邻-取代的烯酸,以研究相应β-苯基
噻吩中可能存在的旋光性。因此,进行了对称取代的 3,3'-二
噻吩基的合成。