作者:Takahiro Itoh、Kimihiko Sato、Toshiaki Mase
DOI:10.1002/adsc.200404159
日期:2004.12
obtained with 1,1′-bis(di-tert-butylphosphino)ferrocene (=D-t-BPF) under anhydrous conditions. Tolerance of various arylboronic acids was also found. Subsequent reduction with H2/Pd-C of one of the coupling adducts, 4-amino-5-nitro-2-phenylpyrimidine, gave the diamine, which was further condensed with activated acid derivatives to afford a wide variety of the 2-phenylpurine derivatives in excellent
Suzuki-Miyaura 将卤代嘌呤与芳基硼酸交叉偶联是合成 C-2-芳基嘌呤的最有效方法之一。然而,由于这种方法隐含了一些潜在的缺点,我们需要设计一个更有效的过程。从容易由 5-硝基尿嘧啶制备的 4-氨基-2-氯-5-硝基嘧啶开始,似乎可以消除我们的担忧,并详细检查了 Suzuki-Miyaura 偶联的适用性。在 Suzuki-Miyaura 协议中通常采用的水性条件下,相当大的竞争性水解与所需的反应同时发生。在无水条件下使用 1,1'-双(二叔丁基膦基)二茂铁 (=Dt-BPF) 获得了优异的收率。还发现了对各种芳基硼酸的耐受性。