Synthesis of new oxindole derivatives containing benzothiazole and thiazolidinone moieties using nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU) as catalyst

A facile one-pot synthesis of novel oxindole derivatives bearing benzothiazolylmethyl-2-thioxothiazolidin-4-one was accomplished via one-pot reaction of 5-oxoindolinylidene rhodanine-3-acetic acid derivatives, 2-aminothiophenol, and triphenyl phosphite in the presence of tetrabutylammonium bromide (TBAB) and nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU) as heterogeneous reusable nanocatalyst. The target compounds were obtained in excellent yields (85%--92%) and short reaction times under fairly mild reaction conditions.

Anahtar Kelimeler:

Oxindole derivatives, benzothiazoles, 4-thiazolidinones, nano silica-bonded 5-n-propyl-octahydro-pyrimido [1, 2-a]azepinium chloride, nano silica-supported catalyst

Synthesis of new oxindole derivatives containing benzothiazole and thiazolidinone moieties using nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU) as catalyst

Keywords:

Oxindole derivatives, benzothiazoles, 4-thiazolidinones, nano silica-bonded 5-n-propyl-octahydro-pyrimido [1, 2-a]azepinium chloride, nano silica-supported catalyst,

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