作者:Hanuman P. Kalmode、Kishor L. Handore、D. Srinivasa Reddy
DOI:10.1021/acs.joc.7b00794
日期:2017.7.21
Serendipitous findings of an acid mediated skeletal rearrangement of bicyclo-β-ketoester having cyclopropyl ring to access fused tricyclic γ-butyrolactones has been described. This novel transformation has been optimized to 30 mol% p-toluenesulfonic acid (p-TSA) in toluene using Dean–Stark apparatus, where the aldol condensation, cyclopropyl ring opening followed by cyclization took place in a single-pot
已经描述了酸介导的具有环丙基环的双环-β-酮酸酯的酸介导的骨架重排以接近稠合的三环γ-丁内酯的偶然发现。使用Dean–Stark装置对甲苯中30 mol%的对甲苯磺酸(p -TSA)进行了优化,其中醛醇缩合,环丙基开环和随后的环化反应均在单釜操作中进行。所得的三环化合物是具有天然产物相似性的令人感兴趣的化学型,并且将来可能会发现有用的应用。