Asymmetric Pictet-Spengler Reactions: Synthesis of 1,2,3,4-Tetrahydroisoquinoline Carboxylic Acid (Tic) Chimeras - Spengler, Jan; Schedel, Hartmut; Sieler, Joachim; Quaedflieg, Peter J L M; Broxterman, Quirinus B; Duchateau, Alexander L L; Burger, Klaus (Synthesis, 2001)