We have developed an efficient method for the preparation of enol silyl ethers using novel agents, silazanes together with NaH or DBU catalyst, wherein TMS and TBDMS groups were smoothly and chemoselectively introduced into ketones and aldehydes under mild conditions.
synthesized a novel phenyl C-glycoside analogue of Spliceostatin A, which is potent splicing inhibitor and has anti-cancer activities. We successfully synthesized its right phenyl C-glycoside sugar fragment in shorter steps compared to previous synthetic methods for Spliceostatin A and revealed an appropriate fragment combination with a Julia-coupling reaction. Regarding biological activity, the Ph-C-glycoside
We designed and synthesized a novel 1,2-deoxy-pyranose and terminal epoxide methyl substituted derivatives of spliceostatin A using Julia-Kocienski olefination as a key step. With respect to the biological activity, the 1,2-deoxy-pyranose analogue of spliceostatin A suppressed AR-V7 expression at the nano level (IC50 = 3.3 nM). In addition, the in vivo toxicity test showed that the 1,2-deoxy-pyranose analogue was able to avoid severe toxicity compared to spliceostatin A.