Cyclic enol ether synthesis via arenesulfonyl iodide additions to alkynols
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 enolethers; 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).