Synthesis, characterization and catalytic application of some novel PNP-Ni(II) complexes: Regio-selective [2+2+2] cycloaddition reaction of alkyne
作者:Masilamani Tamizmani、Chinnappan Sivasankar
DOI:10.1016/j.jorganchem.2017.02.039
日期:2017.9
We have also performed alkyne [2+2+2] cycloaddition reaction using Ni(II) complexes and observed high regioselectivity of the products. The observed selectivity is well correlating with the electronic feature of alkynes. The [2+2+2] cycloaddition of electron rich alkynes produced 1,3,5-substituted benzene derivatives as a major product whereas the electron deficient alkynes produced 1,2,4-substituted
DBSA catalyzed cyclotrimerization of acetophenones: An efficient synthesis of 1,3,5-triarylbenzenes under solvent-free conditions
作者:Davinder Prasad、Amreeta Preetam、Mahendra Nath
DOI:10.1016/j.crci.2012.12.008
日期:2013.3
Résumé A facile method for the synthesis of 1,3,5-triarylbenzenes is developed via cyclotrimerization of acetophenones in the presence of 4-dodecylbenzenesulfonic acid (DBSA) as an efficient Bronsted acid catalyst under solvent-free conditions. This synthetic protocol has several advantages such as green reaction conditions, short reaction times, high atom economy and good to excellent yields of the target products. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.doc
Sulfated tungstate catalyzed synthesis of C 3 -symmetric 1,3,5-triaryl benzenes under solvent-free condition
作者:Ganesh D. Wagh、Krishnacharya G. Akamanchi
DOI:10.1016/j.tetlet.2017.06.055
日期:2017.8
Sulfated tungstate catalyzed environmentally benign, simple, one pot, and solvent-free method has been developed for the synthesis of 1,3,5-triarylbenzenes via cyclic self-condensation of three molecules of aryl ketones. High yields, short reaction time, easy work-up procedure and recycling of the catalyst endorse advantage.
Bismuth(III) trifluoromethanesulfonate tetrahydrate is found to efficiently catalyze the cyclotrimerization of acetophenones into 1,3,5-triarylbenzenes in good yields.
Solvent-dependent metal-free chemoselective synthesis of benzimidazoles and 1,3,5-triarylbenzenes from 2-amino anilines and aryl alkyl ketones catalyzed by I2
作者:Yuxin Ding、Renchao Ma、Yongmin Ma
DOI:10.1016/j.tetlet.2021.153016
日期:2021.4
the synthesis of benzimidazoles and 1,3,5-triarylbenzenes via the annulation of 2-amino anilines and arylalkylketones or the cyclization of arylalkylketones, respectively. With 1,4-dioxane as the solvent, sequential CN bond formation followed by C(CO)-C(CH3) bond cleavage leads to the formation of benzimidazoles in a highly selective manner while aldol-type self-condensation of arylalkyl ketones