fig2

Figure 2. Under the ambient pressure of low concentration CO₂ and other different conditions, the catalyst reacted with 0.2 mmol propargyl amines for 12 h and the yields are as follows. (A) Solvent type (1 mL); (B) DMSO (1 mL), temperature; (C) DMSO (1 mL), dosage of catalyst at r.t.; (D) DMSO (1 mL), 10 mg catalyst catalyzes the conversion of different concentrations of CO₂ at r.t. DMSO: Dimethyl sulfoxide.