Reactions of Enone Ethylene Ketals with Methyl Diazomalonate/Bis(acetylacetonato)copper(II)
作者:özkan Sezer、Ayşe Daut、Olcay Anaç
DOI:10.1002/hlca.19950780811
日期:1995.12.13
Several cyclic and acyclic enones and their ethylene ketals/acetals were reacted with dimethyl diazomalonate under bis(acetylacetonato)copper(II) catalysis. Cyclohex-2-en-1-one (1) yielded only C–H insertion products 2 and 3, whereas but-3-en-2-one gave a cyclopropane albeit in very low yield. The ethylene ketals 6 of cyclopent-2-en-1-one and cyclohex-2-en-1-one gave the corresponding cyclopropanes
在双(乙酰丙酮基)铜(II)催化下,几种环状和无环烯酮及其乙烯缩酮/缩醛与重氮丙二酸二甲酯反应。Cyclohex-2-en-1-one(1)仅产生C–H插入产物2和3,而3-en-2-one产生的环丙烷虽然产率很低。环戊-2-烯-1-酮和环己-2-烯-1-酮的乙烯缩酮6给出了相应的环丙烷7,然后将其裂解为酮8。缩醛9和10巴豆醛((Ë) -丁-2-烯醛)和肉桂醛((Ë)-3-苯基丙-2-烯醛)分别产生C–O插入和[2,3]-σ重排产物11b,c和12b,c以及环丙烷11a和11b,它们都是多官能的,合成有用的化合物。