合成了 1,3-亚苯基双(亚甲基)-桥连杯[6]芳烃,其下缘有四个未封端的羟基,桥接单元上有各种官能团。它们在溶液中和结晶状态下的结构通过核磁共振光谱、分子力学计算和 X 射线晶体学分析确定。发现它们采用收缩锥体构象,其中桥接的 1,3-亚苯基双(亚甲基)单元位于下方,从而形成锥体的底部。这些分子中有很强的分子内氢键网络,形成环状阵列;该网络被认为在稳定收缩锥体构象方面发挥着重要作用。还研究了桥接单元的构象迁移率。
A General, Efficient, and Functional-Group-Tolerant Catalyst System for the Palladium-Catalyzed Thioetherification of Aryl Bromides and Iodides
作者:Manuel A. Fernández-Rodríguez、John F. Hartwig
DOI:10.1021/jo802594d
日期:2009.2.20
reaction of aryl bromides and iodides with aliphatic and aromatic thiols catalyzed by palladium complexes of the bisphosphine ligand CyPF-tBu (1) is reported. Reactions occur in excellent yields, broad scope, high tolerance of functional groups, and with turnover numbers that exceed those of previous catalysts by 2 or 3 orders of magnitude. These couplings of bromo- and iodoarenes are more efficient than
报道了由双膦配体 CyPF- t Bu ( 1 )的钯配合物催化的芳基溴化物和碘化物与脂肪族和芳香族硫醇的交叉偶联反应。反应以优异的产率、广泛的范围、高的官能团耐受性以及比以前催化剂高出 2 或 3 个数量级的周转数发生。这些溴代芳烃和碘代芳烃的偶联比氯芳烃的相应反应更有效,并且可以在较少的催化剂负载和/或更温和的反应条件下进行。因此,以前在芳基氯偶联中报道的范围和官能团耐受性的限制现在得到了克服。
[EN] METHODS FOR PREPARING FLUOROALKYL ARYLSULFINYL COMPOUNDS AND FLUORINATED COMPOUNDS THERETO<br/>[FR] PROCÉDÉS DE PRÉPARATION DE COMPOSÉS FLUOROALKYLE ARYLSULFINYLÉS ET COMPOSÉS FLUORÉS APPARENTÉS
申请人:IM & T RES INC
公开号:WO2010022001A1
公开(公告)日:2010-02-25
Novel preparative methods for fluoroalkyl arylsulfinyl compounds are disclosed. Fluorinated compounds as useful fluorinated compounds, intermediates, or builing blocks are disclosed. Useful applications of the fluoroalkyl arylsulfinyl compounds are shown.
Carbon−Sulfur Bond-Forming Reductive Elimination Involving sp-, sp<sup>2</sup>-, and sp<sup>3</sup>-Hybridized Carbon. Mechanism, Steric Effects, and Electronic Effects on Sulfide Formation
作者:Grace Mann、David Baranano、John F. Hartwig、Arnold L. Rheingold、Ilia A. Guzei
DOI:10.1021/ja981428p
日期:1998.9.1
alkynyl sulfides. Reductiveeliminations forming alkenyl alkyl sulfides and aryl alkyl sulfides were the fastest. Eliminations of alkynyl alkyl sulfides were slower, and elimination of dialkyl sulfide was the slowest. Thus the relative rates for sulfide elimination as a function of the hybridization of the palladium-bound carbon follow the trend sp2 > sp ≫ sp3. Rates of reductiveelimination were faster
[EN] N-[3-[2-AMINO-5-(1,1-DIFLUOROETHYL)-4,4A,5,7-TETRAHYDROFURO[3,4-D][1,3]OXAZIN-7A-YL]-4-FLUORO-PHENYL]-5-(TRIFLUOROMETHYL)PYRIDINE-2-CARBOXAMIDE AND ITS (4AR,5S,7AS) ISOMER AS A SELECTIVE BACE1 INHIBITOR FOR TREATING E.G. ALZHEIMER'S DISEASE<br/>[FR] N-[3-[2-AMINO-5-(1,1-DIFLUOROÉTHYL)-4,4A,5,7-TÉTRAHYDROFURO[3,4-D][1,3]OXAZIN-7A-YL]-4-FLUORO-PHÉNYL]-5-(TRIFLUOROMÉTHYL)PYRIDINE-2-CARBOXAMIDE ET SON ISOMÈRE (4AR,5S,7AS) UTILISÉS EN TANT QU'INHIBITEUR SÉLECTIF DE BACE1 DANS LE TRAITEMENT DE LA MALADIE D'ALZHEIMER, PAR EXEMPLE
申请人:LILLY CO ELI
公开号:WO2017200863A1
公开(公告)日:2017-11-23
The present invention provides N-[3-[2-Amino-5-(1,1-difluoroethyl) -4,4a,5,7-tetrahydrofuro[3,4-d][1,3]oxazin-7a-yl]-4-fluoro-phenyl]-5- (trifluoromethyl)pyridine-2-carboxamide, i.e. the compound of Formula I: [Formula should be inserted here] or a pharmaceutically acceptable salt thereof and in particular its (4aR,5S,7aS) isomer as a selective BACE1 inhibitor for treating e.g. Alzheimer's disease and the progression of mild cognitive impairment to Alzheimer's disease.
本发明提供了N-[3-[2-氨基-5-(1,1-二氟乙基)-4,4a,5,7-四氢呋喃[3,4-d][1,3]噁唑-7a-基]-4-氟苯基]-5-(三氟甲基)吡啶-2-羧酰胺,即化合物的化学式I:[Formula should be inserted here]或其药学上可接受的盐,特别是其(4aR,5S,7aS)异构体,作为选择性BACE1抑制剂,用于治疗例如阿尔茨海默病以及从轻度认知障碍发展为阿尔茨海默病的进展。
Carbon-Sulfur Bond Formation of Challenging Substrates at Low Temperature by Using Pd-PEPPSI-IPent
作者:Mahmoud Sayah、Michael G. Organ
DOI:10.1002/chem.201102158
日期:2011.10.10
bromides and chlorides has been achieved under the most mild temperatures yet reported (i.e., room temperature to 40 °C). The bulk afforded by the di‐2,6‐(3‐propylphenyl)imidazolium‐derived Pd‐PEPPSI‐IPent catalyst is believed to actively promote the critical reductive elimination step of the catalytic cycle, thereby eliminating the formation of poisonous off‐cycle dimeric resting states that have plagued