3-Iodo-4-methoxy-benzaldehyde

1-benzyl-1,4-diazepan-5-one

(S)-1-Boc-piperazine-2-carboxylic acid

1-N-BOC-piperazine-2-carboxylic acid methyl ester

(R)-1-Boc-3-methyl-piperazine

(S)-1-N-Boc-piperazine-3-carboxylic acid methyl ester

(S)-1-Boc-2-ethyl-piperazine