A Short Enantioselective Synthesis of Protected l-3-Hydroxy-4-methoxy-5-methyl Phenylalanine and its Corresponding Aldehyde - A Common Subunit of Ecteinascidin-743, Safracin and Congeners - De Paolis, Michaël; Chen, Xiaochuan; Zhu, Jieping (Synlett, 2004)