Oxazoles Are Masked Carboxyls That Activate Ortho-Leaving Groups in Nucleophilic Aromatic Substitution
作者:Donald J. Cram、Judi A. Bryant、Kenneth M. Doxsee
DOI:10.1246/cl.1987.19
日期:1987.1.5
Oxazoles substituted in their 2-positions with 2-methoxy-, 2-fluoro-, or 2,6-difluorophenyl groups, and in their 4,5-positions with methyls or phenyls, were treated with ArMgBr or ArLi to give substituted biphenyl or terphenyl products. The oxazole groups were subsequently converted to esters, acids, or amides. These reactions provide a new unsymmetrical aryl-aryl coupling synthon.
在其 2-位被 2-甲氧基-、2-氟-或 2,6-二氟苯基取代,并在其 4,5-位被甲基或苯基取代的恶唑,用 ArMgBr 或 ArLi 处理得到取代的联苯或三联苯产品。恶唑基团随后转化为酯、酸或酰胺。这些反应提供了一种新的不对称芳基-芳基偶联合成子。