41251-37-0Relevant articles and documents
Infrared Matrix Isolation Study of Magnesium Metal Atom Reactions. Spectra of an Unsolvated Grignard Species
Ault, Bruce S.
, p. 3480 - 3484 (1980)
Reactions of magnesium atoms with methyl halides in argon matrices have given rise to four product bands which can be assigned to a new chemical species, at 543, 1305, 2800, and 2892 cm-1.All four are hydrogenic in nature, and are assigned to the four vibrations of a C3v methyl group in the reaction product.Evidence is presented for insertion of the magnesium atom into the carbon-halogen bond of the methyl halide to form a species H3CMgX, for X = Cl, Br, I.Similar reactions were observed with calcium and strontium atoms, while zinc atoms did not react with methylhalides under these conditions.No evidence was detected for a strong polar covalent carbon-magnesium bond, suggesting that the unsolvated Grignard reagent formed here has a structure other than that of the solvated solution species.
TYK2 INHIBITORS AND USES THEREOF
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Paragraph 00777, (2017/03/21)
The present invention provides compounds, compositions thereof, and methods of using the same for the inhibition of TYK2, and the treatment of TYK2-mediated disorders.
Solvolysis of 2-Aryl-3,3-dimethyl-2-butyl p-Nitrobenzoates. β-Deuterium Kinetic Isotope Effects and the Linear Free Energy Relationships
Liu, Kwang-Ting,Kuo, Mann-Yan
, p. 3523 - 3530 (2007/10/02)
Solvolysis of 2-aryl-3,3-dimethyl-2-butyl p-nitrobenzoates (4a-4d) and the 1,1,1-trideuterio derivatives (5a,5b,5c) in HFIP exhibited a high kinetic isotope effect, k(CH3)/k(CD3) = 1.90 at 60 deg C for the deactivating substrates 4c vs 5c.This effect decreased significantly with increasing electron releasing of the substituent on the aryl ring.Hammett-Brown treatment of the rate data for 4 yielded excellent linear relationships (r = 0.999) with ρ+ = -3.48.It is evident that the contribution of the α-methyl group to the stabilization of the cationic transition state is not constant.The approximation in the linear free energy relationship is discussed.