Access to Fused Tricyclic γ-Butyrolactones, A Natural Product-like Scaffold
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 ringopening followed by cyclization took place in a single-pot