Treatment of benzocyclobutenols substituted on the functional carbon by the NH3BF3-Et2O reagent allows the synthesis of the corresponding tertiary azides. The latter by acid-catalysed breakdown, lead to 2-substituted indoles. A similar result is obtained by treating directly the alcohols with hydrazoic add and concentrated sulfuric acid. This new route to indole nucleus is also extended to the synthesis
通过NH 3 BF 3 -Et 2 O试剂处理在官能碳上取代的
苯并环丁烯醇,可以合成相应的叔
叠氮化物。后者通过酸催化分解,产生2-取代的
吲哚。通过直接用
肼添加和浓
硫酸处理醇,可获得相似的结果。这种
吲哚核的新途径也扩展到多环
吲哚的合成。