The use of microwave irradiation was found to significantly accelerate a one-pot reaction sequence involving a base-catalyzed 5-exo cyclization of appropriately substituted 4-alkyn-1-ols and subsequent Claisen rearrangement of the intermediate 2-methylene tetrahydrofuran derivatives. In most cases, the resulting cycloheptanoid ring systems were produced in a matter of minutes when subjected to microwave irradiation. The use of solvent-free conditions was also found to be compatible with the reaction sequence.
研究发现,使用微波辐照可以显著加快一锅反应序列,该序列涉及碱催化适当取代的 4- 烷醇的 5-外向环化,以及随后中间 2-亚甲基
四氢呋喃衍
生物的克莱森重排。在大多数情况下,微波辐照下几分钟就能生成
环庚烷环系统。研究还发现,使用无溶剂条件与反应顺序也是相容的。