A formal (5+1) annulation reaction from heterodimerization of two different isocyanides: stereoselective synthesis of 2<i>H</i>-benzo[<i>b</i>][1,4]oxazin-2-one
作者:Shikuan Su、Jie Hu、Yongmei Cui、Chongrong Tang、Yali Chen、Jian Li
DOI:10.1039/c9cc06678k
日期:——
A novel (5+1) annulation reaction of functionalized 2-isocyanophenyloxyacrylate and aromatic, aliphatic isocyanides has been disclosed. This domino reaction involves the unusual heterodimerization of two different isocyanides and allows for a quick access to many 2H-benzo[b][1,4]oxazin-2-one derivatives.
已经公开了官能化的2-异氰基苯氧基丙烯酸酯与芳族脂族异氰酸酯的新型(5 + 1)环化反应。该多米诺反应涉及两种不同异氰酸酯的不同寻常的异二聚,并允许快速获得许多2 H-苯并[ b ] [1,4]恶嗪-2-酮衍生物。
Vinylphosphonium Salt Mediated Reaction between Alkyl Propiolates and Aminophenols or Hydroxyphenols
Addition of catechol to methyl propiolate or ethyl phenylpropiolate in the presence of Ph3P leads to methyl 2-(1,3-benzodioxol-2-yl)acetate or 3-(1-phenylmethylidene)-1,4-benzodioxin-2-one. 2-Aminophenols react with alkyl propiolates in the presence of Ph3P to produce a nearly 1:1 mixture of 3-methyl-2H-1,4-benzoxazin-2-one derivatives and methyl (E)-3-(2-aminophenoxy)-2-propenoates.
A domino reaction of 2-isocyanophenyloxyacrylate and aryne to synthesize arenes with vicinal olefin and benzoxazole
作者:Shikuan Su、Jianxiong Li、Mingming Sun、Hongbin Zhao、Yali Chen、Jian Li
DOI:10.1039/c8cc05735d
日期:——
An unusual domino reaction of 2-isocyanophenyloxyacrylate and aryne has been disclosed. The present strategy experiences nucleophilic addition, Michael addition, carbon–oxygen cleavage, and cyclization, thus enabling the quick aryne vicinal difunctionalization by the installation of a benzoxazole and an olefin.