New processes for producing decitabine are provided.
提供了生产地西他滨的新工艺流程。
The contribution of adenines in the catalytic core of 10-23 DNAzyme improved by the 6-amino group modifications
作者:Junfei Zhu、Zhiwen Li、Qi Wang、Yang Liu、Junlin He
DOI:10.1016/j.bmcl.2016.07.076
日期:2016.9
In the catalytic core of 10-23 DNAzyme, its five adenine residues are moderate conservative, but with highly conserved functional groups like 6-amino group and 7-nitrogen atom. It is this critical conservation that these two groups could be modified for better contribution. With 2'-deoxyadenosineanalogues, several functional groups were introduced at the 6-amino group of the five adenine residues
cross-cooupling with bis(4,6-dichloropyrimidin-5-yl)zinc. This cross-coupling afforded a series of (het)aryl-pyrimidines that were converted to fused deazapurine heterocycles through azidation and thermal cyclization. The fused heterocycles were glycosylated to the corresponding 2′-deoxy- and ribonucleosides, and a series of derivatives were prepared by nucleophilic substitutions at position 4. Four series