609-32-5Relevant articles and documents
Intramolecular hydrogen bonding in 2-nitromalonaldehyde: Infrared spectrum and quantum chemical calculations
Tayyari,Moosavi-Tekyeh,Zahedi-Tabrizi,Eshghi,Emampour,Rahemi,Hassanpour
, p. 191 - 199 (2006)
2-Nitromalonaldehyde (NO2MA), a simple compound to study the intramolecular hydrogen bond, has been synthesized and deuterated at the enolated proton. Molecular structure and vibrational frequencies of NO 2MA have been investigated by means of density functional theory (DFT) calculations. The geometrical parameters obtained in the B3LYP level using 6-31G**, 6-311G**, and 6-311++G** basis sets and compared with the corresponding parameters of malonaldehyde (MA). Frequencies calculated at B3LYP level using the 6-311G** and 6-311++G** basis sets are in good agreement with the corresponding experimental results for light and deuterated compounds in CCl 4/CS2 solution. The percentage of deviation of the bond lengths and bond angles was used to give a picture of the normal modes, and serves as a basis for the assignment of the wavenumbers. Theoretical calculations show that the hydrogen bond strength of NO2MA is slightly stronger than that of MA, which is in agreement with the spectroscopic results. The observed νOH/νOD and γOH/γOD appears at about 2880/2100 and 911/695 cm-1, respectively, are consistent with the calculated geometry and proton chemical shift results. To investigate the effect of NO2 group on the hydrogen bond strength, the charge distributions, steric effects, and electron delocalization in NO2MA and MA were studied by the Natural Bond Orbital (NBO) method for optimized model compounds at B3LYP/6-311++G** level of theory. The results of NBO analysis indicate that the electron-withdrawing effect of NO2 group decreases the hydrogen bond strength, but the steric and resonance effects increase the strength of the bond.
PYRROLONE OR PYRROLIDINONE MELANIN CONCENTRATING HORMONE RECEPTOR-1 ANTAGONISTS
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Paragraph 00232, (2014/03/26)
The present invention provides compounds of Formula (I): as defined in the specification and compositions comprising any of such novel compounds. These compounds are melanin concentrating hormone receptor-1 (MCHR1) antagonists which may be used as medicaments.
SULFONAMIDE COMPOUNDS AND USES AS TNAP INHIBITORS
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Paragraph 00669, (2013/09/12)
Described herein are compounds that modulate the activity of TNAP. In some embodiments, the compounds described herein inhibit TNAP. In certain embodiments, the compounds described herein are useful in the treatment of conditions associated with hyper- mineralization.
KINASE INHIBITOR COMPOUNDS
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Page/Page column 33-34, (2008/12/07)
Pyridine and pyridazine derivatives have unexpected drug properties as inhibitors of protein kinases and are useful in treating disorders related to abnormal protein kinase activities such as cancer.