Synthesis of New (E)-2-(1H-Indole-3-ylcarbonyl)-3-heteroaryl-acrylonitriles via Microwave-Assisted Knoevenagel Condensation

Table 1

Products of Knoevenagel condensation: structures and reaction parameters.

Compound	R	mp. (°C)	Reaction time (min)	Yield (%)
3a		196–198	30	30
3b		160–163	8	71
3c		207–209	25	85
3d		200–203	35	74
3e		233–235	55	94
3f		255–257	30	86
3g		323–325	50	74
3h		278–280	90	65
3i		272–274	20	83

Isolated yields.