Control of Product in the Reaction of Tributyltin ω-Haloalkoxide (<i>n</i>-Bu<sub>3</sub>SnO(CH<sub>2</sub>)<i><sub>n</sub></i>X) with Diphenylketene
作者:Ikuya Shibata、Akio Baba、Haruo Matsuda
DOI:10.1246/bcsj.59.4000
日期:1986.12
The reaction of tributyltin ω-haloalkoxide with diphenylketene gave cyclic ketene acetals and/or lactones, and the ratio of these products were controled by the number of methylene groups and by the addition of Lewis base in the reaction system. Moreover, the direct cycloaddition of diphenylketene with cyclic ethers proceeded in high yields, catalyzed by organotin halide–Lewis base complexes.
三丁基锡ω-卤代醇盐与二苯基乙烯酮反应生成环状乙烯酮缩醛和/或内酯,这些产物的比例通过亚甲基的数量和反应体系中路易斯碱的加入来控制。此外,二苯基乙烯酮与环醚的直接环加成反应以高产率进行,由有机锡卤化物-路易斯碱配合物催化。