The Reaction of 2-(Acylamino)benzonitriles with Primary Aromatic Amines: A Convenient Synthesis of 2-Substituted 4-(Arylamino)quinazolines
作者:Elina Marinho、M. Proença
DOI:10.1055/s-0034-1380322
日期:2015.6
4-(arylamino)quinazolines were prepared from 2-(acylamino)benzonitriles and primary arylamines by refluxing in either ethanol using trifluoroacetic acid as a catalyst or acetic acid. The 2-aminobenzonitrile was acylated by reaction with anhydrides, isocyanates, or ethyl chloroformate at room temperature. 2-Substituted 4-(arylamino)quinazolines were prepared from 2-(acylamino)benzonitriles and primary arylamines
Ortho-Substituent Effects on Diphenylurea Packing Motifs
作者:Marina A. Solomos、Taylor A. Watts、Jennifer A. Swift
DOI:10.1021/acs.cgd.7b00757
日期:2017.10.4
one-dimensional (1D) hydrogen bonded chains. In Type II, urea molecules rotate about a 1D hydrogen bond axis forming twisted chains. Urea groups do not hydrogen bond to one another in Type III. Energy calculations performed at the B3LYP/6-31G(d,p) level show a higher rotationalbarrier about the amide bond in oPUs compared to meta-substituted diphenylureas (mPUs), which may explain the smaller range of torsion
Controlling molecular tautomerism through supramolecular selectivity
作者:Kanishka Epa、Christer B. Aakeröy、John Desper、Sundeep Rayat、Kusum Lata Chandra、Aurora J. Cruz-Cabeza
DOI:10.1039/c3cc43935f
日期:——
We have isolated the stable as well as the metastable tautomers of 1-deazapurine in the solid state by exploiting principles of supramolecularselectivity in the context of cocrystal design.
T3P mediated intramolecular rearrangement of <i>o</i>-aminobenzamide to <i>o</i>-ureidobenzonitrile using isothiocyanates
作者:Sadashivamurthy Shamanth、Sandhya C. Nagarakere、Kunigal S. Sagar、Yatheesh Narayana、Mahesha Mamatha、Kanchugarakoppal S. Rangappa、Mantelingu Kempegowda
DOI:10.1080/00397911.2021.1873384
日期:——
of o-ureidobenzonitriles, from o-aminobenzamides and isothiocyanates using T3P. Here, the conversion of thiourea to urea and amide to nitrile take place simultaneously via unprecedented intramolecularrearrangement. This protocol is operationally facile and offers wide variety of o-ureidobenzonitriles at room temperature in good to excellent yields.
I<sub>2</sub>-Catalyzed transformation of <i>o</i>-aminobenzamide to <i>o</i>-ureidobenzonitrile using isothiocyanates
作者:Sadashivamurthy Shamanth、Nagaraju Chaithra、Mahesha Gurukiran、Mahesha Mamatha、N. K. Lokanath、Kanchugarakoppal S. Rangappa、Kempegowda Mantelingu
DOI:10.1039/d0ob00118j
日期:——
The present work describes an unexpected and unique protocol for the iodine catalysed synthesis of o-ureidobenzonitriles using o-aminobenzamides and isothiocyanates via intramolecular rearrangement.