In situ cross-linked chitosan Cu(I) or Pd(II) complexes as a versatile, eco-friendly recyclable solid catalyst

▶ Ultrasound-assisted procedure to synthesize solid supported Cu(I) and Pd(II) catalysts. ▶ Metal-loaded cross-linked chitosan as efficient, eco-friendly and recyclable catalyst. ▶ Cu(I)-loaded cross-linked chitosan efficiently used for click reactions. ▶ Pd(II)-loaded cross-linked chitosan catalyzed Suzuki couplings.