Trifluoromethylation of the amide group

Levin, Vitalij V.; Козлов, Михаил А.; Dilman, Alexander D.; Belyakov, Pavel A.; Стручкова, Марина И.; Tartakovsky, Vladimir A.

doi:10.1007/s11172-010-0039-x

Cited by 13 publications

(12 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similalry, reduction of 35 with NaBH 4 /BF 3 ·OEt 2 provides 1-benzyl-2-(trifluoromethyl)pyrrolidine. [35] Interaction of enamine with protic acids generates iminium ion and counterion. If counterion may activate the silicon reagent, the reaction of siliconate complex with iminium ion would afford CF 3 -substituted amine.…”

Section: Trifluoromethylation Of Iminium Ionsmentioning

confidence: 99%

Nucleophilic Trifluoromethylation of C=N Bonds

2011

View full text Add to dashboard Cite

show abstract

Section: Trifluoromethylation Of Iminium Ionsmentioning

confidence: 99%

Nucleophilic Trifluoromethylation of C=N Bonds

2011

View full text Add to dashboard Cite

show abstract

“…• The relation: S/Se=(M/Me) µ , where S and M the meteoroid middle section and mass respectively (from Levin (1956Levin ( , 1961). • The shape-factor A=S/W 2/3 , where W is the meteoroid volume.…”

Section: Derivation Of the Criterionmentioning

confidence: 99%

“…Up to this point we have accepted µ (Levin 1956(Levin , 1961 as fixed with a value of 2/3. Although this is valid for most cases, an accurate analysis of this parameter is necessary in some studies.…”

Section: Figure 2 -Diagram Showing the Lnα And Lnβ For Morp And Pn Damentioning

confidence: 99%

Physically based alternative to the PE criterion for meteoroids

Moreno-Ibáñez

Gritsevich

Trigo-Rodríguez

et al. 2020

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Meteoroids impacting the Earth atmosphere are commonly classified using the PE criterion. This criterion was introduced to support the identification of the fireball type by empirically linking its orbital origin and composition characteristics. Additionally, it is used as an indicator of the meteoroid tensile strength and its ability to penetrate the atmosphere. However, the level of classification accuracy of the PE criterion depends on the ability to constrain the value of the input data, retrieved from the fireball observation, required to derive the PE value. To overcome these uncertainties and achieve a greater classification detail we propose a new formulation using scaling laws and dimensionless variables that groups all the input variables into two parameters that are directly obtained from the fireball observations. These two parameters, α and β, represent the drag and the mass loss rates along the luminous part of the trajectory, respectively, and are linked to the shape, strength, ablation efficiency, mineralogical nature of the projectile, and duration of the fireball. Thus, the new formulation relies on a physical basis. This work shows the mathematical equivalence between the PE criterion and the logarithm of 2αβ under the same PEcriterion assumptions. We demonstrate that log(2αβ) offers a more general formulation which does not require any preliminary constraint on the meteor flight scenario and discuss the suitability of the new formulation for expanding the classification beyond fully disintegrating fireballs to larger impactors including meteorite-dropping fireballs. The reliability of the new formulation is validated using the Prairie Network meteor observations.

show abstract

“…Nevertheless, there are only a few examples in the literature concerning the synthesis and applications of these compounds. [15][16][17][18][19][20][21][22] In this paper, we describe an efficient synthesis of trifluoromethylated amines through trifluoromethylation of iminium salts with trimethyl(trifluoromethyl)silane under metal-free and oxidant-free reaction conditions.…”

mentioning

confidence: 99%