Synthesis of Perfluoroalkyl-Substituted<i>γ</i>-Lactones and 4,5-Dihydropyridazin-3(2<i>H</i>)-ones<i>via</i>DonorAcceptor Cyclopropanes
作者:Daniel Gladow、Hans-Ulrich Reissig
DOI:10.1002/hlca.201200413
日期:2012.10
presence of perfluoroalkyl‐ or perfluoroaryl‐substituted silyl enol ethers smoothly provided the corresponding alkyl 2‐siloxycyclopropanecarboxylates in very good yields. The generated donoracceptor cyclopropanes are equivalents of γ‐oxo esters, which we demonstrated by their one‐pot transformations to yield fluorine‐containing heterocycles. A reductive procedure selectively afforded perfluoroalkyl‐substituted
在全氟烷基或全氟芳基取代的甲硅烷基烯醇醚存在下,Rh 2(OAc)4催化重氮酯的分解可提供非常高的收率,从而平稳地提供了相应的烷基2-甲硅烷氧基环丙烷羧酸酯。生成的供体受体环丙烷与γ-氧代酯等效,我们通过一锅转化证明了它产生含氟杂环。还原程序选择性地提供了全氟烷基取代的γ-羟基酯或γ-内酯。捐助者的待遇带有丙烷或苯肼的受体环丙烷提供了一系列全氟烷基和全氟芳基取代的4,5-二氢哒嗪-3(2 H)-酮。