A mixture of samarium(II) iodide and samarium can induce a coupling reaction of three molecules of alkanoyl halide to give trialkylcarbinols of 2-hydroxy-1,3-diones. When aliphatic, unbranched alkanoyl chlorides are used, this new coupling reaction provides trimeric products as the main reaction products. Tetrahydropyran (THP) proved superior as the solvent because no ring-opening and subsequent reaction
碘化钐 (II) 和钐的混合物可以诱导三分子烷酰卤的偶联反应,生成 2-羟基-1,3-二酮的三烷基甲醇。当使用脂肪族无支链烷酰氯时,这种新的偶联反应提供了三聚产物作为主要反应产物。四氢吡喃 (THP) 作为溶剂被证明是优越的,因为在反应条件下没有观察到开环和随后与烷酰卤的反应,这与使用 THF 时不同。