electrophiles in Ni-catalyzed Suzuki-Miyaura cross-coupling reactions. The C-sulfone bond in the α-oxo-vinylsulfone motif is cleaved chemoselectively in these reactions, furnishing C-aryl glycals or acyclic vinyl ethers in high yields. These reactions proceed under mild conditions and tolerate a remarkable scope of heterocycles and functional groups. Preliminary mechanistic studies revealed the importance of
我们证明,在 Ni 催化的 Suzuki-Miyaura 交叉偶联反应中,容易获得且工作台稳定的 α-氧代乙烯基砜是有能力的亲电试剂。在这些反应中,α-氧代-乙烯基砜基序中的 C-砜键被化学选择性地裂解,以高产率提供 C-芳基乙二醇或无环乙烯基醚。这些反应在温和的条件下进行,并且可以耐受范围广泛的杂环和官能团。初步的机理研究揭示了 α-杂原子在促进这些转变中的重要性。
Discovery of Ipragliflozin (ASP1941): A novel C-glucoside with benzothiophene structure as a potent and selective sodium glucose co-transporter 2 (SGLT2) inhibitor for the treatment of type 2 diabetes mellitus
several compounds, the benzothiophene derivative (14a) was found to have potent inhibitory activity against SGLT2 and good selectivity versus SGLT1. Through further optimization of 14a, a novel benzothiophene derivative (14h; ipragliflozin, ASP1941) was discovered as a highly potent and selectiveSGLT2inhibitor that reduced blood glucose levels in a dose-dependent manner in diabetic models KK-Ay mice and