Two novel handles for peptide amide preparation under mild conditions were developed for use in highly efficient solid-phase peptide synthesis. These handles, 5-{[(R, S)-5-[(9- fluorenylmethoxy-carbony1) aminol-l0, l l-dihydrodibenzo [u, dlcyclohepten-2-ylloxy} valeric acid (CHA) and 5-{[(R, S)-5-[(9-fluorenylmethoxycarbonyl) aminoldibenzo [u, dlcyclohepten- 2-ylloxy} vale~ c acid (CHE), were attached to the solid support and were used for ...