摘要:
The treatment Of Propargylic esters tethered to bicyclo[3.2.0]heptanone, 2-methylindanone, 2-methyltetralone, or 2-methylsuberone led to fused tricyclic allenoates by an intramolecular alkynylogous Mukaiyama aldol type reaction promoted by TBSOTf/NEt(3), the key intermediates being silylalkynylketene acetals. (c) 2008 Elsevier Ltd. All rights reserved.