5-Chloro- and 5-bromo-benzo[b]thiophen-3-carbaldehydes were prepared from the corresponding 3-bromomethyl compound, either by the Sommelet reaction (65% yield) or by the Kröhnke reaction (30% yield). They had the usual properties of an aromatic aldehyde; in particular, they underwent the Doebner reaction with malonic acid, and formed crystalline condensation products with rhodanine.
由相应的3-
溴甲基化合物通过Sommelet反应(65%收率)或通过Kröhnke反应(30%收率)制得5-
氯-和5-
溴-苯并[ b ]
噻吩-3-
甲醛。它们具有芳香醛的通常特性;特别是,它们与
丙二酸进行了Doebner反应,并与
罗丹宁形成了结晶缩合产物。