(E)-1,2-Dichlorovinyl ethers and amides are easily accessible from trichloroethylene via nucleophilic addition across in situ synthesized dichloroacetylene. A one-pot, sequential Suzuki-Miyaura coupling/intramolecular direct arylation between dichlorovinyl ethers and organoboronic acids provides easy access to a variety of benzofurans in only two steps from inexpensive commercially available compounds. The method is extendable to the preparation of indoles from the analogous dichlorovinyl amides.
(E)-
1,2-二氯乙基醚和二
氯乙
酰胺可以从
三氯乙烷中通过原位合成的
二氯乙炔介导的亲核加成轻松制得。采用一次性顺序的 Suzuki-Miyaura �ounding/间分子直接
甲基化反应,二
氯乙基醚与有机
硼酸反应可一次性制备多种
苯并呋喃,且只需两种步骤便从廉价商品中获得。该方法可扩展至二
氯乙
酰胺以制备催化的
苯并
三氮唑。