Synthesis of 5′-Fluoro-5′-deoxy-and 5′-Amino-5′-Deoxytoyocamycin and Sangivamycin and Some Related Derivatives
作者:Moheshwar Sharma、Yi X. Li、Miroslav Ledvina、Miroslav Bobek
DOI:10.1080/15257779508010707
日期:1995.11
A series of 5'-substituted analogs of toyocamycin were prepared by condensation of silylated 4-amino-6-bromo-5-cyanopyrrolo[2,3-d]pyrimidine with protected 5-azidod-deoxy- or 5-fluoro-5-deoxyribofuranose followed by debromination and deblocking. Alternatively, 5'-azido-5'-deoxytoyocamycin was prepared by azidation of toyocamycin. Conversion of the 5-nitrile function of the toyocamycin derivatives into a carboxamide or a thiocarboxamide gave the corresponding analogs of sangivamycin or thiosangivamycin while reduction of the 5'-azido-5'-deoxy nucleosides provided 5'-amino-5'-deoxy derivatives.