28178-42-9Relevant articles and documents
1,1′-Dicarbodiimidoferrocenes: Synthesis, Characterization, and Group IV 1,1′-Bisguanidinateferrocene Complexes
Palomero, Orhi Esarte,Jones, Richard A.
, p. 2689 - 2698 (2019)
We report the two-step one-pot preparation of a series of bulky substituted 1,1′-dicarbodiimidoferrocene proligands. In solution the compounds achieve equilibrium with the corresponding 2,4-diimino-1,3-azetidine products which exhibit distinct spectroscopic and electrochemical features. Metalation of the carbodiimides with M(NMe2)4 (M = Zr, Hf) leads to fluxional six-coordinate compounds that exhibit intermediate Bailar twist features in solution and in the solid state. Coordination of the 2,4-diimino-1,3-diazetidines to Zr(NMe2)4 results in a metal-mediated carbodiimide metathesis into two zirconium guanidinate complexes, which can be rationalized by a two-step reaction mechanism.
Stability and lifetime of quadruply hydrogen bonded 2-Ureido-4[1H]-pyrimidinone dimers
Soentjens, Serge H. M.,Sijbesma, Rint P.,Van Genderen, Marcel H. P.,Meijer
, p. 7487 - 7493 (2000)
2-Ureido-4[1H]-pyrimidinones are known to dimerize via a strong quadruple hydrogen bond array. A detailed study of the dimerization constant and lifetime of the dimer is presented here. Excimer fluorescence of pyrene-labeled 2-ureido-4[1H]-pyrimidinone 1b was used to determine a dimerization constant K(dim) of 6 x 107 M-1 in CHCl3, 1 x 107 M-1 in chloroform saturated with water, and 6 x 108 M-1 in toluene (all at 298 K). Under these conditions, the preexchange lifetime of the similar dimers of both 1d and 1e is 170 ms in CDCl3, 80 ms in wet CDCl3, and 1.7 s in toluene-d8, as determined by dynamic NMR spectroscopy. Association rate constants were calculated from the K(dim) values and the preexchange lifetimes. The resulting values are significantly lower than the diffusion-controlled association rate constants calculated using the Stokes-Einstein and the Debeije equations. This difference is ascribed to a tautomeric equilibrium of the monomer between the dimerizing 4[1H]-pyrimidinone and nondimerizing 6[1H]-pyrimidinone tautomers, which is unfavorable for dimerization.
SULFONIMIDAMIDE COMPOUNDS AS NLRP3 MODULATORS
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Paragraph 0432, (2021/07/31)
Described herein are compounds of Formula (I), Formula (I-A), and Formula (I-B), solvates thereof, tautomers thereof, and pharmaceutically acceptable salts of the foregoing, Further described herein are methods of inhibiting NLRP3 using said compounds, and methods of and compositions useful in treating NLRP3-dependent disorders.
ENHANCED BIOAVAILABILITY OF N-(2,6-BIS(1-METHYLETHYL) PHENYL)-N'-((1-(4-(DIMETHYLAMINO)-PHENYL)CYCLOPENTYL) METHYL)UREA HYDROCHLORIDE
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Page/Page column 17-18, (2017/02/09)
Methods for enhancing the bioavailability of N-(2,6-bis(1-methylethyl)phenyl)-N'-((1-(4-(dimethylamino)phenyl)cyclopentyl)-methyl)urea hydrochloride (ATR-101)through administration with food, and compositions and kits related thereto.
