[EN] MODULATORS OF MAS-RELATED G-PROTEIN RECEPTOR X2 AND RELATED PRODUCTS AND METHODS [FR] MODULATEURS DU RÉCEPTEUR MRGPRX2 ET PRODUITS ET PROCÉDÉS ASSOCIÉS
Copper‐Mediated Fluorination of Aryl Trisiloxanes with Nucleophilic Fluoride
作者:Ruth Dorel、Philip Boehm、Daniel P. Schwinger、John F. Hartwig
DOI:10.1002/chem.201905040
日期:2020.2.6
the nucleophilicfluorination of heptamethyl aryl trisiloxanes to form fluoroarenes is reported. The reaction proceeds in the presence of Cu(OTf)2 and KHF2 as the fluoridesource under mild conditions for a broad range of heptamethyltrisiloxyarenes with high functional group tolerance. The combination of this method with the silylation of aryl C-H bonds enables the regioselective fluorination of non-activated
Nucleophilic Aromatic Substitution (S<sub>N</sub>Ar) as an Approach to Challenging Carbohydrate–Aryl Ethers
作者:Alexander S. Henderson、Sandra Medina、John F. Bower、M. Carmen Galan
DOI:10.1021/acs.orglett.5b02413
日期:2015.10.2
A general and practical route to carbohydrate–aryl ethers by nucleophilic aromatic substitution (SNAr) is reported. Upon treatment with KHMDS, C–O bond formation occurs between carbohydrate alcohols and a diverse range of fluorinated (hetero)aromatics to provide the targets in good to excellent yields. Commercially available arylating agents, high atom economy, and high regioselectivity are notable
据报道,通过亲核芳族取代(S N Ar)制取碳水化合物-芳基醚的通用方法是可行的。用KHMDS处理后,碳水化合物醇与各种氟化(杂)芳烃之间便会形成C–O键,从而以良好至极佳的收率提供了目标化合物。该方案的显着特征是可商购的芳基化剂,高原子经济性和高区域选择性。芳族醚产物具有广泛用途的潜力,如合成新型手性P,N-配体所举例说明的。
Anhydrous flouride salts and reagents and methods for their production
申请人:DiMagno G. Stephen
公开号:US20060089514A1
公开(公告)日:2006-04-27
Anhydrous organic fluoride salts and reagents prepared by a method comprising the nucleophilic substitution of a fluorinated aromatic or fluorinated unsaturated organic compound with a salt having the formula:
[Q
n
M]
x+
A
x
−
in an inert polar, aprotic solvent; wherein M is an atom capable of supporting a formal positive charge, the n groups Q are independently varied organic moieties, n is an integer such that the [Q
n
M] carries at least one formal positive charge, x is an integer defining the number of formal positive charge(s), +, carried by the [Q
n
M], A
−
is an anionic nucleophile capable of substituting for F in the fluorinated compound and F represents fluorine or a radioisotope thereof.
Fluorine nuclear magnetic resonance spectra of some meta-substituted fluorobenzenes
作者:J. Hirst、S. J. Una
DOI:10.1039/j29690000646
日期:——
fluorobenzene of some 3- and 3,5-substituted fluorobenzenes have been measured for solutions in acetone and methanol. Correlation of the shifts with various substituent parameters is not good, and comparison of the 3-series with the 3,5-series shows that the effect of substituents is not additive. A correlation exists between the logarithm of the rate constants for the methoxydefluorination of some 5-substituted
对于丙酮和甲醇中的溶液,已经测量了一些3和3,5-取代的氟苯相对于氟苯的19 F nmr位移。位移与各种取代基参数的相关性不好,并且将3系列与3,5-系列进行比较表明,取代基的作用不是累加的。一些5-取代的3-硝基-氟代苯的甲氧基脱氟速率常数的对数与它们的19 F位移之间存在相关性。