Two Binuclear Nonionic Magnetic Resonance Contrast Agents with High Relaxivity
- Corresponding author: Shen Linjiang, ljshen@njtech.edu.cn
	            Citation:
	            
		            Sun Hongshun, Li Yulong, Jiang Hong, Guo Cheng, Shen Linjiang. Two Binuclear Nonionic Magnetic Resonance Contrast Agents with High Relaxivity[J]. Chinese Journal of Organic Chemistry,
							;2018, 38(7): 1779-1785.
						
							doi:
								10.6023/cjoc201801044
						
					
				
					 
				
	        
 
	                
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The chelator DOTAH (A), the first MRI prodrug-procontrast complex (B), a necrosis avid contrast agent (C) and two novel binuclear CAs designed and synthesized in this study (D, E)
Reagents and conditions: (ⅰ) BrCH2COOt-Bu, NaHCO3; (ⅱ) BrCH2COOEt, K2CO3; (ⅲ) Hydrazine hydrate, methanol; (ⅳ) Ethanol, 80 ℃; (ⅴ) TFA, r.t., 24 h; (ⅵ) GdCl3, 50 ℃, 24 h
r1 and r2 relaxivity curves of 8a (A, B), r1 and r2 relaxivity curves of 8b (C, D), T1-weighted MR images of 8a~8b and Gd-DOTA at different concentrations from 0.25 to 2.0 mmol/L (E, F)