Chiral <i>N</i>,<i>N</i>-Disubstituted Trifluoro-3-Amino-2-Propanols Are Potent Inhibitors of Cholesteryl Ester Transfer Protein
作者:Richard C. Durley、Margaret L. Grapperhaus、Brian S. Hickory、Mark A. Massa、Jane L. Wang、Dale P. Spangler、Deborah A. Mischke、Barry L. Parnas、Yvette M. Fobian、Nigam P. Rath、Dorothy D. Honda、Ming Zeng、Daniel T. Connolly、Deborah M. Heuvelman、Bryan J. Witherbee、Michele A. Melton、Kevin C. Glenn、Elaine S. Krul、Mark E. Smith、James A. Sikorski
DOI:10.1021/jm020038h
日期:2002.8.1
A novel series of substituted N-benzyl-N-phenyl-trifluoro-3-amino-2-propanols are described that reversibly inhibit cholesteryl ester transfer protein (CETP). Starting with screening lead 22, various structural features were explored with respect to inhibition of the CETP-mediated transfer of [(3)H]cholesterol from high-density cholesterol donor particles to low-density cholesterol acceptor particles
Thiourea‐Catalyzed C−F Bond Activation: Amination of Benzylic Fluorides
作者:Camille Houle、Paul R. Savoie、Clotilde Davies、Damien Jardel、Pier Alexandre Champagne、Brigitte Bibal、Jean‐François Paquin
DOI:10.1002/chem.202001905
日期:2020.8.17
thiourea catalyst and Ti(OiPr)4 as a fluoride scavenger allows the amination of benzylic fluorides to proceed in moderate to excellent yields. Preliminary results with S‐ and O‐based nucleophiles are also presented. DFT calculations reveal the importance of hydrogen bonds between the catalyst and the fluorineatom of the substrate to lower the activation energy during the transition state.
我们描述了第一个硫脲催化的CF键活化。使用硫脲催化剂和Ti(O i Pr)4作为氟化物清除剂可使苄基氟化物的胺化反应以中等至极好的收率进行。还介绍了基于S和O的亲核试剂的初步结果。DFT计算揭示了催化剂和底物氟原子之间氢键对于降低过渡态活化能的重要性。