An expedient synthesis of pyrrolidinyl spirooxindole grafted 3-nitrochromanes through 1,3-dipolar cycloaddition reaction of azomethine ylides
Keywords: 1،3-دوقطبی; 1,3-Dipole; Cycloaddition; Azomethine ylide; Pyrrolidinyl-spirooxindole; 3-Nitrochromenes;