Critical Ligand and Salt Effects in Organomagnesiate‐Promoted 3,3‐Disubstituted Phthalides Synthesis from 2‐Iodobenzoate Derivatives
作者:Sabrina Touchet、Callum Yeardley、Charles T. O'Hara、Philippe C. Gros
DOI:10.1002/ejoc.202100899
日期:2021.9.14
exchange, using the bimetallic organomagnesiate ate complex (rac)-(BIPHEN)BuMgLi, of easily available 2-iodobenzoates derivatives followed by addition of (enolizable) ketones and intramolecular cyclisation lead to the formation of a panel of new diversely 3,3-disubstituted phthalides in good yield. The magnesiate (rac)-(BIPHEN)BuMgLi was the only MHE agent we tested which allowed this transformation
令人惊讶的是 ( rac )-(BIPHEN)BuMgLi(THF) x Li + Cl -。金属卤素交换,使用双金属有机镁酸盐络合物 ( rac )-(BIPHEN)BuMgLi,容易获得的 2-碘苯甲酸盐衍生物,然后添加(烯醇化)酮和分子内环化导致形成一组新的多样化 3,3 -二取代的邻苯二甲酸酯收率良好。镁酸盐( rac )-(BIPHEN)BuMgLi 是我们测试的唯一允许这种转化的 MHE 试剂,它已通过溶液态1 H、7 Li 和1 H DOSY NMR 实验表征,并用于合成已知的生物活性物质分子。