A one-pot three-component method for the synthesis of 2-methyl-3-aminobenzofurans using calcium carbide as a concise solid alkyne source, and salicylaldehydes and secondary amines as starting materials is described. This protocol has salient feature of the use of inexpensive, abundant and easy-to-handle alkyne source, avoiding the use of inflammable and explosive acetylene gas as an original alkyne source. In addition, step economy, satisfactory yield, and simple work-up procedure are also advantages of this route.

中文翻译：

---

以碳化钙为简明固体炔烃源一锅法三组分合成 2-甲基-3-氨基苯并呋喃

描述了一种以碳化钙为简明固体炔烃源，以水杨醛和仲胺为原料合成 2-甲基-3-氨基苯并呋喃的一锅三组分法。该协议的显着特点是使用廉价、丰富和易于处理的炔烃源，避免使用易燃易爆的乙炔气体作为原始炔烃源。此外，步骤经济、收率令人满意、后处理程序简单也是该路线的优点。