Benzyltriphenylphosphonium bromide (BTPB) has been applied as an efficient catalyst for the preparation of bis(indolyl)methanes (BIMs) via electrophilic substitution of indoles with aldehydes in the absence of solvent.
SBA-15 is an interesting mesoporous silica material having highly ordered nanopores and a large surface area, which is widely employed as a catalyst. This mesoporous silica due to silanol groups is easily functionalized by various organic materials. A new acidic ordered functionalized mesoporous silica (SBA-15-Aminopropyl-Benzyl-SO3H) has been introduced as an efficient catalyst for solvent-free esterification […]
In the present study, robust, versatile and straightforward strategy for the diversity-oriented convergent synthesis of a vast range of highly functionalized and biologically effective chromenes is introduced with the reaction of malononitrile, dimedone/cyclohexadione/4-hydroxycoumarin and benzaldehydes in the presence of [γ-Fe2O3@HAp-Si(CH2)3BF4@DMIM] as the catalyst. The structures of all the newly synthesized products were characterized by spectroscopic […]
Densely functionalized 3,4-dihydropyridones were synthesized by a four-component reaction of Meldrumʼs acid, ethyl acetoacetate, ammonium acetate, and proper aromatic aldehydes in the presence of novel organic-inorganic cobalt incorporated magnetic nanocatalyst (γ-Fe2O3@HAp/Co(II)) using ethanol as a green solvent at reflux condition. This new synthetic method provided the target compounds in a high yield (70-95%) and lower […]
