Oxidative Sulfonylation of Hydrazones Enabled by Synergistic Copper/Silver Catalysis
作者:Jun Xu、Chao Shen、Xian Qin、Jie Wu、Pengfei Zhang、Xiaogang Liu
DOI:10.1021/acs.joc.0c02249
日期:2021.3.5
A copper/silver-cocatalyzed protocol for oxidative sulfonylation of hydrazones is demonstrated. A wide range of β-ketosulfones and N-acylsulfonamides are directly synthesized in moderate to good yields. Our work provides a viable method for scalable preparation of β-ketosulfone derivatives that have found wide applications in the pharmaceutical industry.
A palladium‐catalyzed highly stereoselective sulfonylation of vinylethylene carbonates for the precise synthesis of structurally diverse (Z)‐allylic sulfones was achieved with excellent regioselectivity and stereoselectivity (Z/E ratio, up to 99 : 1). This protocol used inexpensive sodium sulfinates as sulfonyl sources to construct valuable (Z)‐allylic sulfones in good to excellent yields. The controlling
Direct radical sulfonylation at α-C(sp3)-H of THF with sodium sulfinates in aqueous medium
作者:Manjula Singh、Lal Dhar S. Yadav、Rana Krishna Pal Singh
DOI:10.1016/j.tetlet.2019.02.021
日期:2019.3
convenient and highly regioselective synthesis of 2-alkyl/aryl sulfonyl tetrahydrofurans (THFs) has been achieved from THF and sodium sulfinates using K2S2O8 as a mildoxidant. This one-potsimple protocol involves an efficient radical cross coupling reaction in aqueous medium utilizing K2S2O8 as an inexpensive and easy to handle radical surrogate at roomtemperature.
使用K 2 S 2 O 8作为温和氧化剂,可以从THF和亚磺酸钠中直接合成无过渡金属,方便且高度区域选择性的2-烷基/芳基磺酰基四氢呋喃(THF)。这种一锅简单的方案涉及在水性介质中利用K 2 S 2 O 8作为廉价且易于在室温下进行自由基替代的高效自由基交叉偶联反应。
Compounds - 945
申请人:PIKE Kurt Gordon
公开号:US20090018134A1
公开(公告)日:2009-01-15
A compound of formula (I)
or a pharamaceutically acceptable salt thereof, processes for their preparation, pharmaceutical compositions containing them and their use in therapy, for example in the treatment of proliferative disease such as cancer and particularly in disease mediated by an mTOR kinase and/or one or more PI3K enzyme.