Expedient Synthesis of α-(2-Azaheteroaryl) Acetates via the Addition of Silyl Ketene Acetals to Azine-<i>N</i>-oxides
作者:Allyn T. Londregan、Kristen Burford、Edward L. Conn、Kevin D. Hesp
DOI:10.1021/ol501359r
日期:2014.6.20
A new and expedient synthesis of α-(2-azaheteroaryl) acetates is presented. The reaction proceeds rapidly under mild conditions via the addition of silyl ketene acetals to azine-N-oxides in the presence of the phosphonium salt PyBroP. This procedure affords diverse α-(2-azaheteroaryl) acetates which are highly desirable components/building blocks in molecules of pharmaceutical interest but are traditionally
A One-Pot Sonogashira Coupling and Annulation Reaction: An Efficient Route toward 4H-Quinolizin-4-ones
作者:Zhengwang Chen、Tanggao Liu、Xiaoyue Ma、Pei Liang、Lipeng Long、Min Ye
DOI:10.1055/s-0037-1611748
日期:2019.4
An efficient one-pot Sonogashira coupling and annulation reaction affording 4 H -quinolizin-4-ones in moderate to excellent yields is described. A variety of substituted iodoarenes and 2-alkylazaarenes were well tolerated, and especially the unsaturated double and triple bonds were compatible under the standard conditions.
Metal-Free Aminothiation of Alkynes: Three-Component Tandem Annulation toward Indolizine Thiones from 2-Alkylpyridines, Ynals, and Elemental Sulfur
作者:Zhengwang Chen、Pei Liang、Fan Xu、Zhen Deng、Lipeng Long、Guotian Luo、Min Ye
DOI:10.1021/acs.joc.9b01802
日期:2019.10.4
A metal-free three-component annulation reaction for the synthesis of indolizine thiones via tandem C-C/C-N/C-S bondformation was developed. Various 2-alkylpyridines with aromatic ynals and elemental sulfur proceeded smoothly under catalyst-free conditions, and the desired products were obtained in moderate to excellent yields.
Compounds and compositions comprising compounds that inhibit glutaminase are described herein. Also described herein are methods of using the compounds that inhibit glutaminase in the treatment of cancer.
Cu/sulfoxide phosphine (SOP) complex catalyzed nucleophilic addition of fluorinated enolates to gem-difluoroalkenes. The enantioenriched vicinal difluorides, containing a chiral tertiary fluoride and a fluoroalkene, were successfully afforded via C–C bond formation in good yields (up to 94% yield), high Z/E-selectivity (5:1 → 50:1 for Z-isomer), and excellent enantioselectivities (up to 98.5:1.5 er). Utility
在这里,我们描述了第一个对映选择性 Cu/亚砜膦 (SOP) 配合物催化氟化烯醇化物与偕二氟烯烃的亲核加成。含有手性叔氟化物和氟代烯烃的对映体富集的连二氟化物通过 C-C 键的形成成功地提供了良好的产率(高达 94% 的产率),高Z / E选择性(5:1 → 50:1 for Z -异构体)和出色的对映选择性(高达 98.5:1.5 er)。通过对复杂的生物活性化合物的修饰证明了这种方法的实用性。