alcohols form ethers with allyl bromide in good yields; conversion of these ethers to the alkyne hexacarbonyl dicobalt complexes using Co2(CO)8, followed by intramolecular cyclisation gives substituted 3-oxabicyclo[3.3.0]oct-6-en-7-ones (4a–4e) in fair to moderate yields.
一系列取代的炔
丙醇与烯丙基
溴可形成高收率的醚。使用Co 2(CO)8将这些醚转化为炔六羰基二
钴复合物,然后进行分子内环化,以中等至中等的量取代了3-氧杂双环[3.3.0] oct-6-en-7-ones(4a–4e)。产量。