The present invention is directed to compounds, tautomers and pharmaceutically acceptable salts of the compounds which are disclosed, wherein the compounds have the structure of Formula I,
wherein the variables R
1
, R
2
and R
3
are as defined in the specification. Corresponding pharmaceutical compositions, methods of treatment, methods of synthesis, and intermediates are also disclosed.
US9174988B2
申请人:——
公开号:US9174988B2
公开(公告)日:2015-11-03
US9611264B1
申请人:——
公开号:US9611264B1
公开(公告)日:2017-04-04
General sulfone construction <i>via</i> sulfur dioxide surrogate control
作者:Shihao Chen、Yaping Li、Ming Wang、Xuefeng Jiang
DOI:10.1039/c9gc03841h
日期:——
sulfones with a facile combination of halides, sulfurdioxide surrogates and phosphate esters is described. When thiourea dioxide was employed as a reductive sulfurdioxide surrogate, alkyl–alkyl sulfones were obtained under transitionmetal free conditions. Aryl–alkyl sulfones were obtained with an extremely low catalytic loading (0.2 mol%) via altering the mask of sulfurdioxide surrogates to sodium
Manganese(I)-Pincer Catalyzed α-Alkylation of Sulfones by Alcohols
作者:Lijun Lu、Jie Luo、David Milstein
DOI:10.1021/acscatal.3c00369
日期:2023.5.5
benzyl alcohol derivatives were used as alkylation reagents. Herein, we report α-alkylation of sulfones using alcohols catalyzed by a pincer complex of earth-abundant manganese. The Mn-PNN-bipyridyl complex exhibited good performance in reactionselectivity. The amount of base also had an important influence on the smooth transformation. Aromatic and aliphatic alcohols are suitable alkylation reagents for
砜是有机合成和药物化学中的基础材料。使用以水为唯一副产物的醇对砜进行直接α-烷基化是一种有效且有前途的结构修饰方法。然而,在影响反应选择性的转化中始终存在竞争反应。例如,除了所需的 α-烷基化外,还经常观察到 Julia 型烯化和 α-烯基化,尤其是当苯甲醇衍生物用作烷基化试剂时。在此,我们报告了使用由地球上丰富的锰的钳状络合物催化的醇对砜进行的 α-烷基化。Mn-PNN-联吡啶络合物在反应选择性方面表现出良好的性能。碱的量对顺利转变也有重要影响。