The Steric Effects of Alkyl Groups on the N–H Stretching Vibrations and the Rotational Isomerism of Alkylureas
作者:Yoshiyuki Mido、Tamotsu Gohda
DOI:10.1246/bcsj.48.2704
日期:1975.10
of the trans N–H band. It was also observed that the larger the effective size of the R′ group on R2UR′ is, the stronger the intensity of the additional band becomes. It was concluded, in connection with the rotational isomerism of dialkylureas, that the additional band arises from a form in which the N–H group is out of the skeletal plane.
Aminopyrazine compounds as modulators of an adenosine receptor are provided. The compounds may find use as therapeutic agents for the treatment of diseases mediated through a G-protein-coupled receptor signaling pathway and may find particular use in oncology.
The Use of Ureates as Activators for Samarium Diiodide
作者:Chriss E. McDonald、Jeremy D. Ramsey、Christopher C. McAtee、Joseph R. Mauck、Erin M. Hale、Justin A. Cumens
DOI:10.1021/acs.joc.6b00733
日期:2016.7.15
substrates of low reactivity such as aryl fluorides. Because of ease of synthesis and low molecular weight, the conjugate base of triethylurea (TEU–) was of primary focus. Visible spectroscopy and reactivity data are consistent with the hypothesis that the same complex is being formed when SmI2 is combined with either 2 or 4 equiv of TEU–, in spite of the greater reactivity of SmI2/4 TEU– with some alkyl
SUBSTITUTED PYRAZOLONE COMPOUNDS AND METHODS OF USE
申请人:Calitor Sciences, LLC
公开号:US20150037280A1
公开(公告)日:2015-02-05
The present invention provides novel substituted pyrazolone compounds, pharmaceutical acceptable salts and formulations thereof useful in modulating the protein tyrosine kinase activity, and in modulating cellular activities such as proliferation, differentiation, apoptosis, migration and invasion. The invention also provides pharmaceutically acceptable compositions comprising such compounds and methods of using the compositions in the treatment of hyperproliferative disorders in mammals, especially humans.
rate constants of the thermal dissociation of 1,1-dimethyl, 1,3-diethyl, 1,3-diisopropyl, 1,1, 3-triethyl, 1, 3-dihexyl, 1,3-dibenzyl, 1, 1-diethyl-3-isopropyl and 1,3-di-t-butyl ureas in n-butyric,n-caproic,n-capric, phenylacetic and benzoicacids were deter mined. The effects of substituents and those of solvents on the reaction rate were discussed. The transition state of the dissociation containing