In the presence of PEG as phase transfer catalyst and soild KOH as base,dibenzoylmethane undergoes monoalkylation with bromoethane in acetone under microwave irradiation.

• 在相转移催化剂聚乙二醇的存在下,以固体氢氧化钾为碱性试剂,二苯甲酰甲烷与溴乙烷在丙酮中用微波辐射发生乙基化反应。