作者:Dan Peters、Anna-Britta Hörnfeldt、Salo Gronowitz
DOI:10.1002/jhet.5570280626
日期:1991.10
Some Pd-catalyzed coupling reactions have been evaluated for the synthesis of 5-substituted cytosines. A large number of 5-arylcytosines were prepared in good yields by using 2,4-O,N-bis-trimethylsilyl-5-iodocytosine with various aryl tin compounds. The use of trimethylsilyl groups proved to be essential for the reaction, attempted coupling of 5-iodocytosine and 2-trimethylstannylthiazole was not successful
已评估了某些Pd催化的偶联反应可合成5取代的胞嘧啶。通过将2,4 - O,N-双-三甲基甲硅烷基-5-碘胞嘧啶与各种芳基锡化合物一起使用,以高收率制备了大量5-芳基胞嘧啶。已证明使用三甲基甲硅烷基对于该反应是必不可少的,尝试将5-碘胞嘧啶和2-三甲基苯乙烯基噻唑偶联是不成功的。不幸的是未成功的一种方便的替代方案是将偶联官能团反转并使商用的芳基卤化物与5-三甲基锡烷基-或5-三丁基锡烷基衍生物或相应的2,4 - O,N-双-三烷基甲硅烷基胞嘧啶偶联。