Diversity-Oriented Approach to 1,2,3,4-Tetrahydroisoquinoline-3-carboxylic Acid (Tic) Derivatives Using Diethyl Acetamidomalonate as a Glycine Equivalent: Further Expansion by Suzuki–Miyaura Cross-Coupling Reaction
摘要:
Synthesis of diverse 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) derivatives and its higher analogues are reported using diethyl acetamidomalonate as a glycine equivalent. In addition, various substituted Tic derivatives are assembled by application of Suzuki-Miyaura cross-coupling reaction as a key step.
A convenient method is reported for synthesizing various 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid derivatives and bis-armed acid derivatives by treating dibromo-o-xylylenes precursor with diethyl acetamidomalonate under basic conditions. Suzuki coupling reaction has been to expand this methodology. One of the structure revision of 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid into bis-armed amino acid is also reported.