An efficient route for the synthesis of several novel 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) derivatives has been reported. A synergistic combination of [2+2+2]- and [4+2]-cycloaddition reactions has been used for the synthesis of the desired targets.
1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid - Rongalite - cycloaddition - amino acids - quinones