Electroreductive coupling of aromatic ketones, aldehydes, and aldimines with α,β-unsaturated esters: Synthesis of 5-aryl substituted γ-butyrolactones and lactams
作者:Naoki Kise、Yusuke Hamada、Toshihiko Sakurai
DOI:10.1016/j.tet.2017.01.013
日期:2017.2
The electroreductive intermolecular coupling of aromatic ketones and aldehydes with α,β-unsaturated esters in the presence of TMSCl gave the adducts as γ-trimethylsiloxy esters. The detrimethylsilylation of the adducts with TBAF afforded 5-aryl substituted γ-butyrolactones. The electroreductive coupling of N-(4-methoxyphenyl)-1-arylmethaneimines with methyl acrylate in the presence of TMSCl gave the
在TMCSC1存在下,芳族酮和醛与α,β-不饱和酯的电还原分子间偶联产生加合物,为γ-三甲基甲硅烷氧基酯。用TBAF将加合物的三甲基甲硅烷基化得到5-芳基取代的γ-丁内酯。N的电耦合-(4-甲氧基苯基)-1-芳基亚甲基与TMSCl存在下的丙烯酸甲酯得到加合物,为4-芳基-4-((4-甲氧基苯基)氨基)丁酸甲酯。通过用NaH环化并随后用CAN氧化,将加合物转化为5-芳基-γ-丁内酰胺。通过该方法由烟醛制备(±)-烟碱。在TMCSC1存在下,芳族酮和醛亚胺与丙烯腈的电还原偶联分别得到4-芳基-4-(三甲基甲硅烷氧基)丁腈和4-芳基-4-((4-甲氧基苯基)氨基)丁腈。