Synthesis of conformationally constrained elimino acid derivatives via ring-closing metathesis

Abstract

Conformationally constrained amino acid derivatives are useful in the synthesis of peptidomimetics. Seven-, and eightmembered conformationally constrained α-imino acid derivatives have been prepared via RCM (ring-closing metathesis). Interestingly, attempts to achieve the synthesis of nine-membered imino acid derivative resulted in the formation of dimeric, 18membered macrocyclic bis-a-imino acid derivative.