N−H Insertion Reactions of Boc-Amino Acid Amides: Solution- and Solid-Phase Synthesis of Pyrazinones and Pyrazines
作者:Hana Matsushita、Sang-Hyeup Lee、Kazuhiro Yoshida、Bruce Clapham、Guido Koch、Jürg Zimmermann、Kim D. Janda
DOI:10.1021/ol047933a
日期:2004.11.1
the corresponding pyrazine-6-one products. The pyrazine-6-ones were further derivatized by N-alkylation or by conversion to the arylpyrazines using sequential bromination and Suzuki coupling reactions. [reaction: see text]
在辛酸铑催化剂存在下,一系列α-重氮-β-酮酸酯与Boc氨基酸酰胺反应。所得的NH插入产物用酸处理,得到1,4-嗪中间体,其被空气氧化以形成相应的吡嗪-6-一产物。使用顺序溴化和Suzuki偶联反应,通过N-烷基化或通过转化为芳基吡嗪,进一步将吡嗪6-酮衍生化。[反应:看文字]