Synthesis and reactions of 3,3-dimethylallyl derivatives of acetylacetone and other poly-β-carbonyl compounds
作者:J. Carnduff、J. A. Miller、B. R. Stockdale、J. Larkin、D. C. Nonhebel、H. C. S. Wood
DOI:10.1039/p19720000692
日期:——
Alkylation of acetylacetone, and of a number of related triketones and lactones, with 3,3-dimethylallyl bromide and 3,3-dimethylallyl diphenyl phosphate gives C-alkylated products under a variety of experimental conditions. The C- and O-(3,3-dimethylallyl) derivatives of acetylacetone undergo ready cyclisation and Claisen rearrangement reactions, respectively, to give products whose isoprenoid part-structures
乙酰丙酮以及许多相关的三酮和内酯与3,3-二甲基烯丙基溴和3,3-二甲基烯丙基二苯基磷酸酯的烷基化在各种实验条件下产生C-烷基化产物。乙酰丙酮的C-和O-(3,3-二甲基烯丙基)衍生物分别进行环化反应和Claisen重排反应,得到类异戊二烯部分结构与酚类异戊二烯类似的产物。通过用三苯基膦二溴化物处理,在温和条件下将乙酰丙酮转化为4-溴戊-3-烯-2-酮。