(E)-3-arylidene-4-diazopyrrolidine-2,5-diones in the Rh(II)-catalyzed condensation with nitriles to form 1,3-oxazoles led to an unexpected outcome. The nitrilium ylide species thought to form on Rh(II)-catalyzed decomposition of diazo compounds underwent a cyclization onto the nearby arylidene moiety followed by 1,5-hydride shift. This led to the formation of a 2-benzazepine core which has special significance
尝试在 Rh( II ) 催化的与腈的缩合反应中使用 ( E )-3-arylidene-4-diazopyrrolidine-2,5-diones以形成 1,3-oxazoles 导致了意想不到的结果。被认为在 Rh( II ) 催化的重氮化合物分解上形成的腈叶立德物种经历了环化到附近的亚芳基部分上,然后发生 1,5-氢化物位移。这导致了 2-苯并氮杂核心的形成,该核心对药物发现具有特殊意义,可以被认为是一种特殊的支架。
A One-pot Green Synthesis of Alkylidenesuccinimides
A mild and facile Wittig reaction between N‐substituted maleimides and aldehydes has been developed. Various synthetically valuable alkylidenesuccinimides were obtained from this one‐pot reaction in high yields (up to 99%). The product was obtained by simple filtration and no extra purification was necessary. Ethanol, an environment‐benign solvent, was found to be a suitable reaction medium.