A Practical Synthesis of a PI3K Inhibitor under Noncryogenic Conditions via Functionalization of a Lithium Triarylmagnesiate Intermediate
作者:Qingping Tian、Zhigang Cheng、Herbert M. Yajima、Scott J. Savage、Keena L. Green、Theresa Humphries、Mark E. Reynolds、Srinivasan Babu、Francis Gosselin、David Askin、Isao Kurimoto、Norihiko Hirata、Mitsuhiro Iwasaki、Yasuharu Shimasaki、Takashi Miki
DOI:10.1021/op3002992
日期:2013.1.18
We report a practical synthesis of PI3K inhibitor GDC-0941. The synthesis was achieved using a convergent approach starting from a thienopyrimidine intermediate through a sequence of formylation and reductive amination followed by Suzuki-Miyaura cross-coupling. Metalation of the thienopyrimidine intermediate involving the intermediacy of triarylmagnesiates allowed formylation under noncryogenic conditions
我们报告了PI3K抑制剂GDC-0941的实用合成。使用收敛方法从噻吩并嘧啶中间体开始,通过一系列甲酰化和还原性胺化反应,然后进行Suzuki-Miyaura交叉偶联,实现了合成。噻吩并嘧啶中间体的金属化涉及三芳基镁酸酯的中间体,从而在非低温条件下进行甲酰化以产生相应的醛。我们还研究了通过苯并三唑基-哌嗪底物进行的氨基烷基化,作为还原性胺化途径的替代方法。我们评估了硼化和铃木-宫浦交叉偶联的钯和镍催化过程。最终的脱保护和盐的形成提供了API。