| abstract |
The invention provides a synthetic method of (purin-6-yl)amino acids which are useful as medicaments of anticancer, anti-virus agents and so on or their intermediates. Methyl (R,S)-3-[4-(9-benzylpurin-6-yl) phenyl]-2-[(t-butoxycarbonyl) amino]propanoate is produced by making 9-benzyl-6-iodopurine react with methyl (R,S)-2-[(t-butoxycarbonyl)amino]-3-[4-(trimethyl-stananyl) phenyl]propionate in the presence of Pd 2 dba 3 , triphenylarsine and copper iodide. |