Long-Range Bonding/Nonbonding Interactions: A Donor–Acceptor Resonance Studied by Dynamic NMR
摘要:
Long-range bonding interactions were evaluated using variable-temperature NMR spectroscopy and suitable 2'-CH2X-substituted phenylpyridines (X = Me, NMe2, OMe, F). It was found that the arylpyridyl rotational barriers were lower when electronegative atoms were bound to the alpha carbon of the 2' moiety. This effect was ascribed to a stabilizing interaction in the transition state due to the lone pair of the heterocyclic nitrogen with the alpha carbon. Computational support for this hypothesis came from CCSD(T)/6-31+G(d) calculations. Steric effects of the X moiety were ruled out by comparison of the rotational barriers of analogous biphenyls.
[EN] AMINO-HETEROARYL 7-HYDROXY-SPIROPIPERIDINE INDOLINYL ANTAGONISTS OF P2Y1 RECEPTOR<br/>[FR] ANTAGONISTES D'AMINO-HÉTÉROARYLE 7-HYDROXYSPIROPIPÉRIDINE INDOLINYLE DU RÉCEPTEUR P2Y1
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2014022253A1
公开(公告)日:2014-02-06
The present invention provides compounds of Formula (I): as defined in the specification and compositions comprising any of such novel compounds. These compounds are antagonists of P2Y1 receptor which may be used as medicaments.
Friedel–Crafts benzylation of arenes with benzyl fluorides has been developed. The reaction produces 1,1‐diaryl alkanes in good yield under mild conditions without the need for a transition metal or a strong Lewis acid. A mechanism involving activation of the CFbond through hydrogen bonding is proposed. This mode of activation enables the selective reaction of benzylic CF bonds in the presence of other benzylic
[EN] SUBSTITUTED BENZOTHIOPHENE ANALOGS AS SELECTIVE ESTROGEN RECEPTOR DEGRADERS<br/>[FR] ANALOGUES DE BENZOTHIOPHÈNE SUBSTITUÉS EN TANT QU'AGENTS DE DÉGRADATION SÉLECTIFS DU RÉCEPTEUR D'ŒSTROGÈNES
申请人:UNIV ILLINOIS
公开号:WO2019157020A1
公开(公告)日:2019-08-15
In one aspect, the disclosure relates to relates to substituted benzothiophene analogs which are useful as selective degraders of estrogen receptor, methods of making same, pharmaceutical compositions comprising same, and methods of treating one or more clinical conditions associated with estrogen receptor, such as a cancer, including breast cancer, or osteoporosis. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
C−F Bond Cleavage by Intramolecular S<sub>N</sub>2 Reaction of Alkyl Fluorides with O- and N-Nucleophiles
作者:Laijun Zhang、Wei Zhang、Jun Liu、Jinbo Hu
DOI:10.1021/jo802819p
日期:2009.4.3
The nucleophilicsubstitution of alkyl fluorides was achieved in the intramolecular reactions with O- and N-nucleophiles. The intramolecular defluorinative cyclization reaction was influenced by the nature of nucleophiles, the size of the ring to be formed, and the comformational rigidity of the precursors. Intermolecular nucleophilicsubstitution reactions of alkyl fluorides under similar reaction
在与O-和N-亲核试剂的分子内反应中实现了烷基氟化物的亲核取代。分子内脱氟环化反应受亲核试剂的性质,要形成的环的大小以及前体的构象刚性的影响。发现在相似的反应条件下烷基氟化物的分子间亲核取代反应是困难的。当前C-F键断裂反应的立体化学研究显示出完全的构型反转,这支持了分子内S N 2反应机理。
ARYLAMINE SYNTHESIS METHOD
申请人:Taillefer Marc
公开号:US20100298571A1
公开(公告)日:2010-11-25
The invention relates to a method for preparing arylamines and, in particular, a method for preparing aniline and anilines substituted on the aromatic ring from ammonia, under easily-industrialised mild conditions with good selectivity and yields, in the presence of a catalytic system including a copper complex.