A TiCl4-promoted domino semipinacolâSchmidt reaction of oxaspiropentane-azide provides an easy access to bridged azatricyclic ring systems, which possess the azaquaternary center, present in the immunosupressant FR901483 and platelet aggregation inhibitor daphlongeranine B.
通过 TiCl4 促进的多米诺半联苯酚施密特反应,可以很容易地获得桥接的氮杂环系统,该系统具有氮杂四元中心,存在于免疫抑制剂 FR901483 和血小板聚集抑制剂达夫龙葵碱 B 中。