Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Prasad A"'
Publikováno v:
Synthetic Communications. 47:1940-1954
WOS: 000414932500003
Friedlander synthesis of 2-acylquinolines from the reaction of symmetrical and unsymmetrical 1,2-diketones with 2-aminoarylketones in the presence of indium triflate (In(OTf)(3)) and ionic liquid gives quantitative yields. O
Friedlander synthesis of 2-acylquinolines from the reaction of symmetrical and unsymmetrical 1,2-diketones with 2-aminoarylketones in the presence of indium triflate (In(OTf)(3)) and ionic liquid gives quantitative yields. O
Autor:
Felipe Camargo Braga, Adilson Beatriz, Gleison A. Casagrande, Rosângela da Silva Lopes, Dênis Pires de Lima, Avvari N. Prasad
Publikováno v:
Synthetic Communications. 48:104-114
An efficient copper (I) halotriphenylphosphine catalyzed one-pot multicomponent reaction (MCR) of 3-substituted indole derivatives has been developed using a variety of aldehydes (aromatic, aliphatic, and heteroaromatic), indole, and active methylene
Publikováno v:
Synthetic Communications. 47:990-998
A new class of dibenzo[b,j][1,10]phenanthrolines has been prepared. The synthon acridones were achieved in very good yield by a one-pot reaction of 2-amino-5-chloro or 2′-chloro/flouro-substituted benzophenones with 1,2-cyclohexanedione in the pres
Autor:
Shahin Fatma, Mandavi Singh, Pankaj Kumar Verma, Kamleshwar Tiwari, Jagdamba Singh, Preyas Ankit, Kamla Prasad Tiwari, Shyam Babu Singh
Publikováno v:
Synthetic Communications. 44:1795-1802
An efficient triphenylphosphine-catalyzed synthesis of β-acetamido carbonyls via multicomponent reaction of aromatic aldehydes, enolizable ketones or β-keto esters, acid chlorides and acetonitrile at room temperature is described. The process is re
Autor:
B. Y. Giri, N. Lingaiah, P.S. Sai Prasad, K. N. Gangadhar, K. Vijaya Lakshmi, B. L. A. Prabavathi Devi, Rachapudi B. N. Prasad
Publikováno v:
Synthetic Communications. 37:2331-2336
Benzimidazoles have been synthesized in very good yield from o‐phenylenediamine and aromatic aldehydes in the presence of monoammonium salt of 12‐tungstophosphoric acid [(NH4)H2PW12O40], an efficient heterogeneous catalyst. This catalyst has the
Publikováno v:
Synthetic Communications. 43:375-383
An efficient method for the synthesis of benzodiazepino and pyrazino-annelated carbazoles by the facile reaction of 2,3,4,9-tetrahydro-1H–carbazol-1-one with anthranilic acid, 3-aminopyrazine-2-carboxylic acid, and glycine catalyzed by polyphosphor
Autor:
Matthias Zeller, Ezhumalai Yamuna, Karnam Jayarampillai Rajendra Prasad, Kumaresan Prabakaran
Publikováno v:
Synthetic Communications. 42:1330-1340
NaHCO3 has been found to be an efficient base catalyst for the synthesis of pyrano[2,3-a]carbazoles from 1-hydroxycarbazoles by multicomponent reaction using solvent-free grinding methods. In this case, the products have been found in good yields, wi
Publikováno v:
Synthetic Communications. 42:627-634
Hantzsch 1,4-dihydropyridines and polyhydroquinoline derivatives were synthesized in good yields by PEG-mediated, catalyst–free synthesis under solvent-free conditions. The products were directly recrystallized from hot methanol. The reaction gave
Publikováno v:
Synthetic Communications. 41:2064-2072
Oximes, allylic, aliphatic, aromatic, cyclic, acyclic, and hetero alcohols are silylated in short reaction times with good yields in the midst of a catalytic amount of sulfated zirconia solid acid catalyst and trimethylsilyl cyanide under nonbasic, s
Publikováno v:
Synthetic Communications. 39:2317-2320
A mild and highly efficient synthesis of thiazoles by the condensation of α-bromo ketones with thiourea in the presence of a catalytic amount of copper acetate at room temperature has been described. The method is applicable for a variety of aryl an