Synthetic approaches to DNMT inhibitor SGI-1027 and effects on the U937 leukemia cell line.

The known DNMT inhibitor SGI-1027 4 has been synthesized using as key steps Pd-catalyzed Ar-N bond formation reactions performed in a sequential or convergent manner. In the former approach, a by-product, which corresponds to the incorporation of two units of 4-chloroquinoline, was also isolated. The biological effects of compound 4 in the U937 human leukemia cell line are also described.