作者:Gavin L. Edwards、Craig A. Muldoon、David J. Sinclair
DOI:10.1016/s0040-4020(96)00346-8
日期:1996.5
these adducts with KN(SiMe3)2 gives enol ethers; cyclisation of the functionalised pentenol (5) results in formation of the exo-alkylidene tetrahydrofuran (7), whereas the homologous hexenol (6) gives the dihydropyran (8). Attempts to cyclise the hexenol (6) with potassium t-butoxide under the conditions reported by Short and Ziegler generally gave the endocyclic ether (8).
芳烃磺酰碘化物与炔醇的反应通常以高收率提供加合物。用KN(SiMe 3)2处理这些加合物,得到烯醇醚。官能化的戊烯醇(5)的环化导致形成外亚烷基四氢呋喃(7),而同源己烯醇(6)得到二氢吡喃(8)。尝试环化的己烯醇(6)与钾吨的条件下,丁醇报道短和齐格勒通常得到环内醚(8)。