Synthesis and reactions of silicon containing cyclic α-amino acid derivatives

A simple synthesis of a new amino acid derivative 5,6-bis(trimethylsilyl)indanylglycine via cobalt mediated [2 + 2 + 2] cycloaddition strategy is described. Co-trimerization of diyne building block containing amino acid moiety with bis(trimethylsilyl)acetylene in presence of CpCo(CO)2 catalyst afforded the silylated indane-based α-amino acid (AAA) derivative. Electrophilic aromatic substitution reaction, ipso to the trimethylsilyl group gave highly functionalised indane-based AAA derivatives.