Citation:
	            
		            Xue Ming Chen,  Xing Shu Li,  Albert S. C. Chan. Highly efficient synthesis of β-amino esters via Mannich-type reaction under solvent-free conditions using ZnCl2 catalyst[J]. Chinese Chemical Letters,
							;2009, 20(4): 407-410.
						
							doi:
								10.1016/j.cclet.2008.12.030
						
					
				
					 
				
	        
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	                	β-Amino esters were synthesized via ZnCl2-catalyzed Mannich-type reaction of imines and malonate esters under solvent-free conditions in 6 min. The β-amino ester was converted into the corresponding aspartic acid derivatives.
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