Copper-Catalyzed One-Pot Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones from 2-Nitrobenzonitriles and Carbonyl Compounds Mediated by Diboronic Acid in Methanol–Water
A copper-catalyzed one-potsynthesis of 2,3-dihydroquinazolin-4(1H)-ones with diboronic acid as a reductant in an aqueous medium is described. Various 2,3-dihydroquinazolin-4(1H)-ones were prepared with good functional-group tolerance in good yields under mild conditions from readily available 2-nitrobenzonitriles and various carbonyl compounds.
A choline hydroxide catalyzed synthesis of 2,3-dihydroquinazolin-4(1H)-ones in an aqueous medium
作者:Pravin N. Borase、Pranila B. Thale、G. S. Shankarling
DOI:10.1039/c6ra15574j
日期:——
A simple, metal and ligand-free protocol for the synthesis of 2,3-dihydroquinazolin-4(1H)-onesderivatives using choline hydroxide (ChOH) as an effective catalyst in an aqueous medium has been developed. The good to...
Amberlyst A26 OH as a Recyclable Catalyst for Hydration of Nitriles and Water-Based Synthesis of 4(1H)-Quinazolinones from 2-Aminobenzonitrile and Carbonyl Compounds
作者:Fatemeh Tamaddon、Farzaneh Pouramini
DOI:10.1055/s-0033-1340986
日期:——
Selective hydration of nitriles to primaryamides as well the base-catalyzedsynthesis of 2-substituted 4(1H)-quinazolinones via reaction of 2-aminobenzonitrile with carbonyl compounds using macroporous Amberlyst A26 OH in H2O–EtOH is described. The latter reaction proceeds via tandem hydration of 2-aminobenzonitrile, condensation of the in situ generated 2-aminobenzamide with carbonyl compounds, and
Auto-Tandem Catalysis with Ruthenium: From <i>o</i>
-Aminobenzamides and Allylic Alcohols to Quinazolinones <i>via</i>
Redox Isomerization/Acceptorless Dehydrogenation
作者:Weikang Zhang、Chong Meng、Yan Liu、Yawen Tang、Feng Li
DOI:10.1002/adsc.201800660
日期:2018.10.4
A strategy for the synthesis of quinazolinonesvia Ru‐catalyzed redoxisomerization/acceptorlessdehydrogenation was proposed and accomplished. In the presence of a commercially available [(p‐cymene)Cl2]2, a range of desirable products were obtained with o‐aminobenzamides and allylicalcohols as starting materials in moderate to high yields. This strategy is attractive due to high atom efficiency,
protocol has been developed for the synthesis of 2,3-dihydroquinazolinone compounds from anthranilamide and aldehydes or ketones via ionicliquidcatalyzed cyclization reaction. The reaction features high efficiency, shorter reaction duration, mild reaction conditions and inexpensive reagents. The catalyst was recovered and reused. The recyclability of ionicliquid resulted in excellent yields of products